The ATP rankings are the Association of Tennis Professionals' (ATP) merit-based method for determining the rankings in men's tennis. The top-ranked player is the player who, over the previous 52 weeks, has garnered the most ATP-ranking points. Points are awarded based on how far a player advances in tournaments and the category of those tournaments. The ATP has used a computerized system for determining the rankings since August 23, 1973.[1] Starting in 1979, an updated rankings list is released at the beginning of each week.[2]

Roger Federer, the current world No. 1

Since 1973, 26 men have been ranked No. 1 by the ATP,[3][4] of which 17 have been year-end No. 1. The current world number one is Roger Federer.[5]

Ranking method

Since the introduction rankings the method used to calculate a player's ranking points has changed several times. As of 2011, the rankings are calculated by totaling the points a player wins in his best eighteen tournaments, subject to certain restrictions. For top players the counting tournaments are the four Grand Slam tournaments, the eight mandatory ATP World Tour Masters 1000 tournaments, the player's best four eligible ATP World Tour 500 series tournaments (the non-mandatory ATP Masters 1000 event in Monte Carlo may be substituted for one of these), and his best two results from ATP World Tour 250 series. Lower-ranked players who are not eligible for some or all of the top tournaments may include additional ATP 500 and ATP 250 events, and also ATP Challenger Series, and Futures Series tournaments. Players who qualify for the year-end ATP World Tour Finals also include any points gained at that tournament in their total, increasing the number of tournaments they may count to 19.[6]

Records and particularities

Roger Federer holds the records for both the most total weeks at No. 1 (303 as of February 19, 2018) and most consecutive weeks at No. 1 (237).[7] Pete Sampras holds the record for the most year-end No. 1 rankings (six, all consecutive).[8][9] Patrick Rafter spent the least time at No. 1 (one week).

Lleyton Hewitt is both the youngest world No. 1 (20 years, 268 days) and youngest year-end No. 1,[10][11] while Rafael Nadal is the oldest year-end No. 1 (31 years, 211 days). Roger Federer is the oldest No. 1 (36 years, 195 days, as of February 19, 2018).[12]

Only four players have regained the year-end No. 1 ranking after having lost it: Lendl (1989), Federer (2009), Nadal (2010, 2013, & 2017), and Djokovic (2014). Nadal is the only player to have done this more than once.

Roger Federer is the ATP player with the longest time span between first and most recent dates at world No. 1 in the history of the ATP Tour. He regained the top ranking on February 19, 2018, more than fourteen years after first becoming No. 1 on February 2, 2004.[13]

Two players, Ivan Lendl and Marcelo Ríos, have reached No. 1 without previously having won a Grand Slam tournament.[14] Lendl reached No. 1 on February 21, 1983, but did not win his first Grand Slam title until the 1984 French Open.[15] Ríos reached No. 1 on March 30, 1998, but retired without ever having won a Grand Slam singles title, making him the only No. 1 player with that distinction.[16][17]

Since 1973 when the ATP rankings started, there have been twelve years in which one player held the top spot for the entire year: Jimmy Connors in 1975, 1976, and 1978; Ivan Lendl in 1986 and 1987; Pete Sampras in 1994 and 1997; Lleyton Hewitt in 2002; Roger Federer in 2005, 2006, and 2007; and Novak Djokovic in 2015. In contrast to this, 1999 saw five different players hold the No. 1 ranking (the most in any single year): Pete Sampras, Carlos Moya, Yevgeny Kafelnikov, Andre Agassi, and Patrick Rafter.

John McEnroe held the No. 1 ranking on a record 14 different occasions, and Pete Sampras is the only other player to have held it on 10 or more occasions with 11 different stints.

Number 1 ranked players

The statistics are updated only when the ATP website revises its rankings (usually every Monday morning except when tournament finals are postponed).
A tennis player in the middle of his service motion, arms and eyes raised
Roger Federer has spent a total of 303 weeks at world No. 1, including 237 consecutive weeks at the top of the ATP rankings, the most of any player. Federer is also the player with the longest time span between first and most recent dates as world No. 1. He regained the ranking on February 19, 2018, over 14 years after he first became world No. 1 on February 2, 2004.
Ilie Năstase became the first ATP world No. 1 ranked player on August 23, 1973.
A tennis player holds a racket in his hand and prepares to serve
Pete Sampras spent a total of 286 weeks at the top of the ATP rankings and holds the record of 6 consecutive years ended as world No. 1.
Ivan Lendl spent a total of 270 weeks at the top of the ATP rankings.
A man wearing white clothes swinging a tennis racket
Jimmy Connors spent a total of 268 weeks at world No. 1, including 160 consecutive weeks (a record he held for 30 years before being overtaken by Federer in 2007).
Novak Djokovic spent a total of 223 weeks at world No. 1.
No. Country Player Start date End date Weeks Total
1  ROU Ilie Năstase August 23, 1973 June 2, 1974 40 40
2  AUS John Newcombe June 3, 1974 July 28, 1974 8 8
3  USA Jimmy Connors July 29, 1974 August 22, 1977 160 160
4  SWE Björn Borg August 23, 1977 August 29, 1977 1 1
 USA Jimmy Connors (2/9) August 30, 1977 April 8, 1979 84 244
 SWE Björn Borg (2/6) April 9, 1979 May 20, 1979 6 7
 USA Jimmy Connors (3/9) May 21, 1979 July 8, 1979 7 251
 SWE Björn Borg (3/6) July 9, 1979 March 2, 1980 34 41
5  USA John McEnroe March 3, 1980 March 23, 1980 3 3
 SWE Björn Borg (4/6) March 24, 1980 August 10, 1980 20 61
 USA John McEnroe (2/14) August 11, 1980 August 17, 1980 1 4
 SWE Björn Borg (5/6) August 18, 1980 July 5, 1981 46 107
 USA John McEnroe (3/14) July 6, 1981 July 19, 1981 2 6
 SWE Björn Borg (6/6) July 20, 1981 August 2, 1981 2 109
 USA John McEnroe (4/14) August 3, 1981 September 12, 1982 58 64
 USA Jimmy Connors (4/9) September 13, 1982 October 31, 1982 7 258
 USA John McEnroe (5/14) November 1, 1982 November 7, 1982 1 65
 USA Jimmy Connors (5/9) November 8, 1982 November 14, 1982 1 259
 USA John McEnroe (6/14) November 15, 1982 January 30, 1983 11 76
 USA Jimmy Connors (6/9) January 31, 1983 February 6, 1983 1 260
 USA John McEnroe (7/14) February 7, 1983 February 13, 1983 1 77
 USA Jimmy Connors (7/9) February 14, 1983 February 27, 1983 2 262
6  TCH Ivan Lendl February 28, 1983 May 15, 1983 11 11
 USA Jimmy Connors (8/9) May 16, 1983 June 5, 1983 3 265
 USA John McEnroe (8/14) June 6, 1983 June 12, 1983 1 78
 USA Jimmy Connors (9/9) June 13, 1983 July 3, 1983 3 268
 USA John McEnroe (9/14) July 4, 1983 October 30, 1983 17 95
 TCH Ivan Lendl (2/8) October 31, 1983 December 11, 1983 6 17
 USA John McEnroe (10/14) December 12, 1983 January 8, 1984 4 99
 TCH Ivan Lendl (3/8) January 9, 1984 March 11, 1984 9 26
 USA John McEnroe (11/14) March 12, 1984 June 10, 1984 13 112
 TCH Ivan Lendl (4/8) June 11, 1984 June 17, 1984 1 27
 USA John McEnroe (12/14) June 18, 1984 July 8, 1984 3 115
 TCH Ivan Lendl (5/8) July 9, 1984 August 12, 1984 5 32
 USA John McEnroe (13/14) August 13, 1984 August 18, 1985 53 168
 TCH Ivan Lendl (6/8) August 19, 1985 August 25, 1985 1 33
 USA John McEnroe (14/14) August 26, 1985 September 8, 1985 2 170
 TCH Ivan Lendl (7/8) September 9, 1985 September 11, 1988 157 190
7  SWE Mats Wilander September 12, 1988 January 29, 1989 20 20
 TCH Ivan Lendl (8/8) January 30, 1989 August 12, 1990 80 270
8  SWE Stefan Edberg August 13, 1990 January 27, 1991 24 24
9  GER Boris Becker January 28, 1991 February 17, 1991 3 3
 SWE Stefan Edberg (2/5) February 18, 1991 July 7, 1991 20 44
 GER Boris Becker (2/2) July 8, 1991 September 8, 1991 9 12
 SWE Stefan Edberg (3/5) September 9, 1991 February 9, 1992 22 66
10  USA Jim Courier February 10, 1992 March 22, 1992 6 6
 SWE Stefan Edberg (4/5) March 23, 1992 April 12, 1992 3 69
 USA Jim Courier (2/4) April 13, 1992 September 13, 1992 22 28
 SWE Stefan Edberg (5/5) September 14, 1992 October 4, 1992 3 72
 USA Jim Courier (3/4) October 5, 1992 April 11, 1993 27 55
11  USA Pete Sampras April 12, 1993 August 22, 1993 19 19
 USA Jim Courier (4/4) August 23, 1993 September 12, 1993 3 58
 USA Pete Sampras (2/11) September 13, 1993 April 9, 1995 82 101
12  USA Andre Agassi April 10, 1995 November 5, 1995 30 30
 USA Pete Sampras (3/11) November 6, 1995 January 28, 1996 12 113
 USA Andre Agassi (2/6) January 29, 1996 February 11, 1996 2 32
13  AUT Thomas Muster February 12, 1996 February 18, 1996 1 1
 USA Pete Sampras (4/11) February 19, 1996 March 10, 1996 3 116
 AUT Thomas Muster (2/2) March 11, 1996 April 14, 1996 5 6
 USA Pete Sampras (5/11) April 15, 1996 March 29, 1998 102 218
14  CHI Marcelo Ríos March 30, 1998 April 26, 1998 4 4
 USA Pete Sampras (6/11) April 27, 1998 August 9, 1998 15 233
 CHI Marcelo Ríos (2/2) August 10, 1998 August 23, 1998 2 6
 USA Pete Sampras (7/11) August 24, 1998 March 14, 1999 29 262
15  ESP Carlos Moyá March 15, 1999 March 28, 1999 2 2
 USA Pete Sampras (8/11) March 29, 1999 May 2, 1999 5 267
16  RUS Yevgeny Kafelnikov May 3, 1999 June 13, 1999 6 6
 USA Pete Sampras (9/11) June 14, 1999 July 4, 1999 3 270
 USA Andre Agassi (3/6) July 5, 1999 July 25, 1999 3 35
17  AUS Patrick Rafter July 26, 1999 August 1, 1999 1 1
 USA Pete Sampras (10/11) August 2, 1999 September 12, 1999 6 276
 USA Andre Agassi (4/6) September 13, 1999 September 10, 2000 52 87
 USA Pete Sampras (11/11) September 11, 2000 November 19, 2000 10 286
18  RUS Marat Safin November 20, 2000 December 3, 2000 2 2
19  BRA Gustavo Kuerten December 4, 2000 January 28, 2001 8 8
 RUS Marat Safin (2/3) January 29, 2001 February 25, 2001 4 6
 BRA Gustavo Kuerten (2/3) February 26, 2001 April 1, 2001 5 13
 RUS Marat Safin (3/3) April 2, 2001 April 22, 2001 3 9
 BRA Gustavo Kuerten (3/3) April 23, 2001 November 18, 2001 30 43
20  AUS Lleyton Hewitt November 19, 2001 April 27, 2003 75 75
 USA Andre Agassi (5/6) April 28, 2003 May 11, 2003 2 89
 AUS Lleyton Hewitt (2/2) May 12, 2003 June 15, 2003 5 80
 USA Andre Agassi (6/6) June 16, 2003 September 7, 2003 12 101
21  ESP Juan Carlos Ferrero September 8, 2003 November 2, 2003 8 8
22  USA Andy Roddick November 3, 2003 February 1, 2004 13 13
23   SUI Roger Federer February 2, 2004 August 17, 2008 237 237
24  ESP Rafael Nadal August 18, 2008 July 5, 2009 46 46
  SUI Roger Federer (2/4) July 6, 2009 June 6, 2010 48 285
 ESP Rafael Nadal (2/4) June 7, 2010 July 3, 2011 56 102
25  SRB Novak Djokovic July 4, 2011 July 8, 2012 53 53
  SUI Roger Federer (3/4) July 9, 2012 November 4, 2012 17 302
 SRB Novak Djokovic (2/3) November 5, 2012 October 6, 2013 48 101
 ESP Rafael Nadal (3/4) October 7, 2013 July 6, 2014 39 141
 SRB Novak Djokovic (3/3) July 7, 2014 November 6, 2016 122 223
26  GBR Andy Murray November 7, 2016 August 20, 2017 41 41
 ESP Rafael Nadal (4/4) August 21, 2017 February 18, 2018 26 167
  SUI Roger Federer (4/4) February 19, 2018 Present 1 303
Key
Current No. 1 player as of February 19, 2018[18][19]
ATP Ranking record

Weeks at No. 1

By player

The table on the left shows the total number of weeks that each player has been ranked No. 1 in their career by the ATP.[7]

The table on the right shows the number of consecutive weeks that each indicated player has been ranked No. 1 by the ATP. [7]

Rank Player Total
1. Switzerland Roger Federer 303
2. United States Pete Sampras 286
3. Czechoslovakia Ivan Lendl 270
4. United States Jimmy Connors 268
5. Serbia Novak Djokovic 223
6. United States John McEnroe 170
7. Spain Rafael Nadal 167
8. Sweden Björn Borg 109
9. United States Andre Agassi 101
10. Australia Lleyton Hewitt 80
11. Sweden Stefan Edberg 72
12. United States Jim Courier 58
13. Brazil Gustavo Kuerten 43
14. United Kingdom Andy Murray 41
15. Romania Ilie Năstase 40
16. Sweden Mats Wilander 20
17. United States Andy Roddick 13
18. Germany Boris Becker 12
19. Russia Marat Safin 9
20. Australia John Newcombe 8
Spain Juan Carlos Ferrero
22. Austria Thomas Muster 6
Chile Marcelo Ríos
Russia Yevgeny Kafelnikov
25. Spain Carlos Moyá 2
26. Australia Patrick Rafter 1
active players - current No. 1 in bold


Rank Player Consecutive
1. Switzerland Roger Federer 237
2. United States Jimmy Connors 160
3. Czechoslovakia Ivan Lendl 157
4. Serbia Novak Djokovic 122
5. United States Pete Sampras 102
6. United States Jimmy Connors (2) 84
7. United States Pete Sampras (2) 82
8. Czechoslovakia Ivan Lendl (2) 80
9. Australia Lleyton Hewitt 75
10. United States John McEnroe 58
11. Spain Rafael Nadal 56
12. United States John McEnroe (2) 53
Serbia Novak Djokovic (2)
14. United States Andre Agassi 52
15. Switzerland Roger Federer (2) 48
Serbia Novak Djokovic (3)
17. Sweden Björn Borg 46
Spain Rafael Nadal (2)
19. United Kingdom Andy Murray 41
20. Romania Ilie Năstase 40
current streak in bold

as of 19 February 2018

By country

Country No. of
players
No. of
weeks
Players Ref
1.  United States 6 896 Jimmy Connors, John McEnroe, Jim Courier, Pete Sampras, Andre Agassi, Andy Roddick [20]
2.  Switzerland 1 303 Roger Federer [20]
3.  Czechoslovakia 1 270 Ivan Lendl [20]
4.  Serbia 1 223 Novak Djokovic [20]
5.  Sweden 3 201 Björn Borg, Mats Wilander, Stefan Edberg [20]
6.  Spain 3 177 Carlos Moyá, Juan Carlos Ferrero, Rafael Nadal [20]
7.  Australia 3 89 John Newcombe, Patrick Rafter, Lleyton Hewitt [20]
8.  Brazil 1 43 Gustavo Kuerten [20]
9.  United Kingdom 1 41 Andy Murray [20]
10.  Romania 1 40 Ilie Năstase [20]
11.  Russia 2 15 Yevgeny Kafelnikov, Marat Safin [20]
12.  Germany 1 12 Boris Becker [20]
13.  Austria 1 6 Thomas Muster [20]
 Chile 1 6 Marcelo Ríos [20]

Year-end No. 1

The ATP year-end No. 1 ranked player is determined as the player at the head of the ATP rankings following the completion of the final tournament of the calendar year, usually in November or December. Pete Sampras holds the record of six year-end No. 1 rankings, which were in consecutive years from 1993 through 1998.

Six players have stayed at ATP No. 1 in the rankings every week of a calendar year. Roger Federer is the only player to have been ranked No. 1 every week for three consecutive calendar years.

Only four players (Ivan Lendl, Federer, Novak Djokovic and Rafael Nadal) have achieved multiple year-end No. 1 rankings in non-consecutive years.

Key
(1) Time as year-end number 1/Total times as year-end number 1
§ Ranked number 1 during every week of the calendar year
Active players [21][22]
John McEnroe playing tennis
John McEnroe finished the year as the top-ranked player for four consecutive years from 1981 to 1984.
Lleyton Hewitt hitting a tennis ball
Lleyton Hewitt was the youngest male player to hold the world No. 1 ranking, at age 20 in November 2001.
Year Player Ref(s)
1973 Romania Ilie Năstase [23]
1974 United States Jimmy Connors (1/5) [24][25]
1975 United States Jimmy Connors § (2/5) [24][25]
1976 United States Jimmy Connors § (3/5) [24][25]
1977 United States Jimmy Connors (4/5) [26]
1978 United States Jimmy Connors § (5/5) [26]
1979 Sweden Björn Borg (1/2) [26]
1980 Sweden Björn Borg (2/2) [26]
1981 United States John McEnroe (1/4) [26][27]
1982 United States John McEnroe (2/4) [26][27]
1983 United States John McEnroe (3/4) [26][27]
1984 United States John McEnroe (4/4) [26][27]
1985 Czechoslovakia Ivan Lendl (1/4) [26][28]
1986 Czechoslovakia Ivan Lendl § (2/4) [28]
1987 Czechoslovakia Ivan Lendl § (3/4) [28]
1988 Sweden Mats Wilander [27]
1989 Czechoslovakia Ivan Lendl (4/4) [27]
1990 Sweden Stefan Edberg (1/2) [29]
1991 Sweden Stefan Edberg (2/2) [29][30]
1992 United States Jim Courier [31]
1993 United States Pete Sampras (1/6) [9]
1994 United States Pete Sampras § (2/6) [32]
1995 United States Pete Sampras (3/6) [9]
1996 United States Pete Sampras (4/6) [9]
1997 United States Pete Sampras § (5/6) [32]
1998 United States Pete Sampras (6/6) [9]
1999 United States Andre Agassi [33]
2000 Brazil Gustavo Kuerten [30][34]
2001 Australia Lleyton Hewitt (1/2) [35]
2002 Australia Lleyton Hewitt § (2/2) [10][36]
2003 United States Andy Roddick [37]
2004 Switzerland Roger Federer (1/5) [38]
2005 Switzerland Roger Federer § (2/5) [39]
2006 Switzerland Roger Federer § (3/5) [40]
2007 Switzerland Roger Federer § (4/5) [41][42]
2008 Spain Rafael Nadal (1/4) [43]
2009 Switzerland Roger Federer (5/5) [44]
2010 Spain Rafael Nadal (2/4) [45][46]
2011 Serbia Novak Djokovic (1/4) [47]
2012 Serbia Novak Djokovic (2/4) [48]
2013 Spain Rafael Nadal (3/4) [49]
2014 Serbia Novak Djokovic (3/4) [50]
2015 Serbia Novak Djokovic § (4/4) [51][52]
2016 United Kingdom Andy Murray [53]
2017 Spain Rafael Nadal (4/4) [54]
Number of Years as Year-end No. 1 Player
6 United States Pete Sampras
5 United States Jimmy Connors
Switzerland Roger Federer
4 United States John McEnroe
Czechoslovakia Ivan Lendl
Serbia Novak Djokovic
Spain Rafael Nadal
2 Sweden Björn Borg
Sweden Stefan Edberg
Australia Lleyton Hewitt
1 Romania Ilie Năstase
Sweden Mats Wilander
United States Jim Courier
United States Andre Agassi
Brazil Gustavo Kuerten
United States Andy Roddick
United Kingdom Andy Murray

Time spans holding the ranking

Between first and last dates No. 1 ranking was held

No. Player Time span Date first held No. 1 ranking Date last held No. 1 ranking
1. Switzerland Roger Federer 20 years, 195 days February 2, 2004 present
2. Spain Rafael Nadal 9 years, 184 days August 18, 2008 February 18, 2018
3. United States Jimmy Connors 8 years, 339 days July 29, 1974 July 3, 1983
4. United States Andre Agassi 8 years, 150 days April 10, 1995 September 7, 2003
5. United States Pete Sampras 7 years, 221 days April 12, 1993 November 19, 2000
6. Czechoslovakia Ivan Lendl 7 years, 165 days February 28, 1983 August 12, 1990
7. United States John McEnroe 5 years, 189 days March 3, 1980 September 8, 1985
8. Serbia Novak Djokovic 5 years, 125 days July 4, 2011 November 6, 2016
9. Sweden Björn Borg 3 years, 344 days August 23, 1977 August 2, 1981
10. Sweden Stefan Edberg 2 years, 52 days August 13, 1990 October 4, 1992
11. United States Jim Courier 1 year, 214 days February 10, 1992 September 12, 1993
12. Australia Lleyton Hewitt 1 year, 208 days November 19, 2001 June 15, 2003
13. Brazil Gustavo Kuerten 349 days December 4, 2000 November 18, 2001
14. United Kingdom Andy Murray 286 days November 7, 2016 August 20, 2017
15. Romania Ilie Năstase 283 days August 23, 1973 June 2, 1974
16. Germany Boris Becker 223 days January 28, 1991 September 8, 1991
17. Russia Marat Safin 153 days November 20, 2000 April 22, 2001
18. Chile Marcelo Ríos 146 days March 30, 1998 August 23, 1998
19. Sweden Mats Wilander 139 days September 12, 1988 January 29, 1989
20. United States Andy Roddick 90 days November 3, 2003 February 1, 2004
21. Austria Thomas Muster 62 days February 12, 1996 April 14, 1996
22. Australia John Newcombe 55 days June 3, 1974 July 28, 1974
Spain Juan Carlos Ferrero 55 days September 8, 2003 November 2, 2003
24. Russia Yevgeny Kafelnikov 41 days May 3, 1999 June 13, 1999
25. Spain Carlos Moyá 13 days March 15, 1999 March 28, 1999
26. Australia Patrick Rafter 6 days July 26, 1999 August 1, 1999
Current No. 1 player as of February 19, 2018

Between first and last dates No. 1 ranking was achieved

No. Player Time span Date of first becoming No. 1 Date of last becoming No. 1
1. Switzerland Roger Federer 14 years, 17 days February 2, 2004 February 19, 2018
2. Spain Rafael Nadal 9 years, 3 days August 18, 2008 August 21, 2017
3. United States Jimmy Connors 8 years, 319 days July 29, 1974 June 13, 1983
4. United States Andre Agassi 8 years, 67 days April 10, 1995 June 16, 2003
5. United States Pete Sampras 7 years, 152 days April 12, 1993 September 11, 2000
6. Czechoslovakia Ivan Lendl 5 years, 337 days February 28, 1983 January 30, 1989
7. United States John McEnroe 5 years, 176 days March 3, 1980 August 26, 1985
8. Sweden Björn Borg 3 years, 331 days August 23, 1977 July 20, 1981
9. Serbia Novak Djokovic 3 years, 3 days July 4, 2011 July 7, 2014
10. Sweden Stefan Edberg 2 years, 32 days August 13, 1990 September 14, 1992
11. United States Jim Courier 1 year, 194 days February 10, 1992 August 23, 1993
12. Australia Lleyton Hewitt 1 year, 174 days November 19, 2001 May 12, 2003
13. Germany Boris Becker 161 days January 28, 1991 July 8, 1991
14. Brazil Gustavo Kuerten 140 days December 4, 2000 April 23, 2001
15. Chile Marcelo Ríos 133 days March 30, 1998 August 10, 1998
Russia Marat Safin 133 days November 20, 2000 April 2, 2001
17. Austria Thomas Muster 28 days February 12, 1996 March 11, 1996

No. 1 ranked players without a previous Grand Slam tournament title

Player Date of first No. 1 position First Grand Slam final reached First Grand Slam title Ref
Czech Republic Ivan Lendl February 28, 1983 1981 French Open (June 1981) (1st of 19) 1984 French Open (1st of 8)
Chile Marcelo Ríos March 30, 1998 1998 Australian Open (January 1998) None (retired in 2004) [14]

See also

References

General

Specific

  1. ^ "How It All Began". atpworldtour.com. Association of Tennis Professionals (ATP). Retrieved July 20, 2012.
  2. ^ "Rankings Explained". www.itftennis.com. International Tennis Federation (ITF).
  3. ^ "ATP Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Archived from the original on April 14, 2011. Retrieved June 11, 2009. ((cite web)): Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  4. ^ "ITF Tennis – How the Rankings Work". International Tennis Federation. August 27, 2003. Retrieved June 11, 2009.
  5. ^ "Federer Returns to No. 1, Mover of the Week". Association of Tennis Professionals (ATP). Retrieved February 19, 2018.
  6. ^ "ATP Ranking and Race Frequently Asked Questions". atpworldtour.com. Association of Tennis Professionals (ATP). Retrieved June 11, 2009.
  7. ^ a b c "History of No. 1". atpworldtour.com. Association of Tennis Professionals (ATP). July 12, 2012. Retrieved July 21, 2012.
  8. ^ "Pete Sampras – Career Highlights". atpworldtour.com. Association of Tennis Professionals (ATP). Retrieved July 21, 2012. Became first player in ATP Rankings history to finish No. 1 for six consecutive years.
  9. ^ a b c d e "Plus: Tennis — ATP Tour World Championship; Sampras Is Assured Of No. 1 Ranking". The New York Times. November 27, 1998. Retrieved September 5, 2012.
  10. ^ a b "Lleyton Hewitt – Career Highlights". atpworldtour.com. Association of Tennis Professionals (ATP). Retrieved July 21, 2012. [Y]oungest player (20 yrs., 8 mos.)...to finish No. 1 in history of ATP Rankings.
  11. ^ "Lleyton Hewitt". BBC. Retrieved 22 May 2012.
  12. ^ "Roger Federer has done the IMPOSSIBLE by returning to world No 1 - Mark Petchey". The Daily Express. 17 February 2018. Retrieved 19 February 2018.
  13. ^ "Federer Smashes Records in Return to No. 1". Association of Tennis Professionals (ATP). Retrieved February 19, 2018.
  14. ^ a b Finn, Robin (March 30, 1998). "Tennis; Rios Dismantles Agassi and Seizes No. 1 Ranking". The New York Times. Retrieved July 21, 2012. Rios...is the first man to earn the ranking without winning a Grand Slam tournament since Ivan Lendl in 1983.
  15. ^ "Worthy of really high fives". Sports Illustrated. CNN. June 18, 1984. Retrieved June 11, 2009.
  16. ^ Wilstein, Steve (February 1, 1998). "Korda takes Australian Open title". The Washington Post. Retrieved June 11, 2009.
  17. ^ "Player biography – Marcelo Ríos". International Tennis Federation. Retrieved June 11, 2009.
  18. ^ "Singles Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Archived from the original on February 19,2018. Retrieved February 19, 2018. ((cite web)): Check date values in: |archivedate= (help)
  19. ^ "Former world No. 1s". Association of Tennis Professionals (ATP). Retrieved February 19, 2018.
  20. ^ a b c d e f g h i j k l m n "Djokovic Becomes 25th Player In History To Rise To No. 1". ATP World Tour. July 4, 2011. Retrieved September 6, 2012.
  21. ^ "Singles Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Archived from the original on April 14, 2011. Retrieved June 8, 2012. ((cite web)): Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  22. ^ "Tennis Rankings world No. 1s". CBSSports.com. Retrieved June 8, 2012.
  23. ^ "Nastase, Vilas, Cooper to enter Tennis Hall of Fame". The Gainesville Sun. March 27, 1991. p. 2C. Retrieved September 6, 2012. Nastase...finished the 1973 season No. 1 in the world.
  24. ^ a b c "Jimmy Connors – Career Highlights". atpworldtour.com. Association of Tennis Professionals (ATP). Retrieved September 5, 2012. He was clearly No. 1, a status he enjoyed from July 1974, for 159 straight weeks...
  25. ^ a b c Crouse, Karen (February 27, 2007). "Federer's Reign Goes on and History Follows". The New York Times. Retrieved September 6, 2012. Jimmy Connors was No. 1 for 160 straight weeks, from July 1974 to August 1977.
  26. ^ a b c d e f g h i "Hewitt jubilant as world's No. 1". The Age. November 15, 2002. Retrieved September 6, 2012. Only five other players – Stefan Edberg (1990–91), Ivan Lendl (1985–87), John McEnroe (1981–84), Bjorn Borg (1979–80) and Jimmy Connors (1974–78) – have achieved the mighty feat.
  27. ^ a b c d e f Robson, Douglas (June 29, 2009). "Federer may reclaim No. 1 rank, but can he keep hold of spot?". USA Today. Retrieved September 6, 2012.
  28. ^ a b c Ford, Bonnie D. (April 9, 2010). "Tennis still imbued in Lendl's blood". ESPN. ESPN Internet Ventures. Retrieved September 6, 2012. In 1988, [Wilander] won a five-set endurance contest, breaking a six-match losing streak to Lendl. The win interrupted Lendl's three-year reign as world No. 1...
  29. ^ a b "Tennis; Winning Courier Stays No. 1". The New York Times. November 21, 1992. Retrieved September 6, 2012. Edberg, the No. 1 player at the end of 1990 and 1991.
  30. ^ a b Clarey, Christopher (December 4, 2000). "Tennis; A Victorious Kuerten Clinches No. 1". The New York Times. Retrieved September 6, 2012. [Kuerten] is the first non-American to finish on top since the Swede Stefan Edberg in 1991.
  31. ^ "Courier finishes year ranked No. 1 McNeil posts another upset in Slims". Fort Worth Star-Telegram. NewsBank. November 21, 1992. Retrieved September 6, 2012. Jim Courier became the first American since John McEnroe in 1984 to finish the year as the No. 1 tennis player in the world... (subscription required)
  32. ^ a b "Pete Sampras – Career Highlights". atpworldtour.com. Association of Tennis Professionals (ATP). Retrieved September 5, 2012. 1997 — Ranked No. 1 every week throughout year for second time (1994)
  33. ^ Wilansky, Matt (August 31, 2006). "Inside the numbers". ESPN. ESPN Internet Ventures. Retrieved September 5, 2012. [I]n 1999 he won the French Open title, the only Major that had eluded him. He finished the year ranked No. 1 in the world for the first and only time in his career.
  34. ^ "2000 ATP Tour Year End Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Archived from the original on June 11, 2010. Retrieved January 10, 2011. ((cite web)): Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  35. ^ "2001 ATP Tour Year End Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Retrieved January 10, 2011.
  36. ^ "2002 ATP Tour Year End Rankings". atpworldtour.com. Retrieved January 10, 2011.
  37. ^ "2003 ATP Year End Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Retrieved January 10, 2011.
  38. ^ "2004 ATP Year End Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Archived from the original on June 11, 2010. Retrieved January 10, 2011. ((cite web)): Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  39. ^ "2005 ATP Year End Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Archived from the original on June 11, 2010. Retrieved January 10, 2011. ((cite web)): Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  40. ^ "2006 ATP Year End Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Archived from the original on December 27, 2011. Retrieved January 10, 2011. ((cite web)): Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  41. ^ "2007 ATP Year End Rankings". atpworldtour.com. Archived from the original on 18 August 2011. Retrieved 8 January 2011. ((cite web)): Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  42. ^ "Federer will finish year at No. 1 after winning home tourney". CBS Sports. October 28, 2007. Retrieved July 14, 2009.
  43. ^ "2008 ATP Year End Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Archived from the original on December 27, 2011. Retrieved January 8, 2011. ((cite web)): Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  44. ^ "2009 ATP World Tour Year End Rankings". atpworldtour.com. Association of Tennis Professionals (ATP). Archived from the original on June 11, 2010. Retrieved January 10, 2011. ((cite web)): Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  45. ^ "2010 ATP World Tour Year End Rankings". atpworldtour.com. Archived from the original on 27 December 2011. Retrieved 10 January 2011. ((cite web)): Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  46. ^ "Nadal clinches year-end No. 1 for second time". atpworldtour.com. Association of Tennis Professionals (ATP). September 16, 2010. Retrieved September 16, 2010.
  47. ^ "Djokovic Clinches Year-End No. 1 For First Time". atpworldtour.com. Association of Tennis Professionals (ATP). October 13, 2011. Retrieved September 6, 2012.
  48. ^ "Djokovic to finish No. 1 in South African Airways ATP Rankings for 2nd straight year". atpworldtour.com. Association of Tennis Professionals (ATP). October 29, 2012. Retrieved November 5, 2012.
  49. ^ "Nadal Clinches Year-End No. 1 Emirates ATP Rankings". November 6, 2013.
  50. ^ "Djokovic clinches year-end No. 1 ranking at ATP World Tour Finals". tennis.com. 14 November 2014. Retrieved 17 November 2014.
  51. ^ "Djokovic Clinches Year-End No. 1 Emirates ATP Ranking For Fourth Time". September 14, 2015.
  52. ^ Fendrich, Howard (14 September 2015). "Novak Djokovic clinches tennis' year-end No. 1 ranking". CBS Sports. Retrieved 14 September 2015.
  53. ^ "Murray beats Djokovic in London, finishes as year-end no. 1". November 20, 2016.
  54. ^ "Nadal Clinches Year-End No. 1 Emirates ATP Ranking For Fourth Time". November 1, 2017.