Lucas Arnold Ker
Singles
Country (sports)	Argentina
Residence	Barcelona, Spain
Born	(1974-10-12) 12 October 1974 (age 49) Buenos Aires, Argentina
Height	1.80 m (5 ft 11 in)
Turned pro	1994
Retired	2016
Plays	Right-handed
Prize money	US$ 1,745,936
Career record	22–31
Career titles	0 2 Challenger, 0 Futures
Highest ranking	No. 77 (20 July 1998)
Grand Slam singles results
Australian Open	1R (1998, 1999)
French Open	2R (1998)
Wimbledon	1R (1998)
US Open	3R (1998)
Doubles
Career record	299–258
Career titles	15 19 Challenger, 1 Futures
Highest ranking	No. 21 (8 March 2004)
Grand Slam doubles results
Australian Open	3R (1999, 2002, 2008, 2009)
French Open	SF (1997)
Wimbledon	3R (2001)
US Open	3R (2003)
Grand Slam mixed doubles results
Australian Open	2R (2002, 2004)
French Open	QF (2004)
Wimbledon	2R (2001, 2004, 2005, 2009)
US Open	2R (2001)
Last updated on: 7 August 2021.

Lucas Arnold Ker (Spanish pronunciation: [ˈlukas aɾˈnol ˈkeɾ];^[1] born 12 October 1974) is an Argentine former professional tennis player.

Arnold Ker started playing tennis in the Olivos Tenis Club of Buenos Aires, under coach Malcolm Campbell. He is the younger brother of Patricio Arnold. He is right-handed and turned professional in 1994. He played several times for the Argentine Davis Cup team, where he made his debut in 1997 against Venezuela. Arnold Ker was Roger Federer's opponent in the latter's first professional match in 1998, beating the 17-year-old future singles world No. 1 and 20-time major singles champion in straight sets. Arnold Ker retired from professional tennis in 2016.

Cancer

In August 2006, he was diagnosed with testicular cancer. The testicle was removed, and he successfully underwent chemotherapy. In 2008, he was in remission and returned to playing professional tennis.^[2]

ATP Tour career finals

Doubles: 33 (15 titles, 18 runner-ups)

Legend
Grand Slam tournaments (0–0)
ATP World Tour Finals (0–0)
ATP World Tour Masters 1000 (0–0)
ATP World Tour 500 Series (0–5)
ATP World Tour 250 Series (15–13)

Titles by surface
Hard (0–1)
Clay (15–15)
Grass (0–0)
Carpet (0–2)

Titles by setting
Outdoor (15–16)
Indoor (0–2)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Aug 1996	San Marino, San Marino	World Series	Clay	Pablo Albano	Mariano Hood Sebastián Prieto	6–1, 6–3
Loss	1–1	Oct 1996	Valencia Open, Spain	World Series	Clay	Pablo Albano	Lucas Arnold Jack Waite	7–6, 3–6, 4–6
Win	2–1	Jun 1999	Merano Open, Italy	World Series	Clay	Jaime Oncins	Marc-Kevin Goellner Eric Taino	6–4, 7–6^(7–1)
Win	3–1	Aug 1999	San Marino, San Marino	World Series	Clay	Mariano Hood	Petr Pála Pavel Vízner	6–3, 6–2
Win	4–1	Sep 1999	Majorca Open, Spain	World Series	Clay	Tomás Carbonell	Alberto Berasategui Francisco Roig	6–1, 6–4
Win	5–1	Oct 1999	Bucharest, Romania	World Series	Clay	Martín García	Marc-Kevin Goellner Francisco Montana	6–3, 2–6, 6–3
Loss	5–2	Feb 2000	Pacific Coast Championships, United States	World Series	Hard	Eric Taino	Jan-Michael Gambill Scott Humphries	1–6, 4–6
Win	6–2	Mar 2000	Bogotá, Colombia	International Series	Clay	Pablo Albano	Joan Balcells Mauricio Hadad	7-6^(7–4), 1–6, 6–2
Loss	6–3	Jul 2000	Stuttgart Open, Germany	International Gold	Clay	Donald Johnson	Jiří Novák David Rikl	7–5, 2–6, 3–6
Win	7–3	Feb 2001	Movistar Open, Chile	International Series	Clay	Tomás Carbonell	Mariano Hood Sebastián Prieto	6–4, 2–6, 6–3
Win	8–3	Feb 2001	Buenos Aires, Argentina	International Series	Clay	Tomás Carbonell	Mariano Hood Sebastián Prieto	5–7, 7–5, 7–6^(7–5)
Loss	8–4	Feb 2002	Movistar Open, Chile	International Series	Clay	Luis Lobo	Gastón Etlis Martín Rodríguez	3–6, 4–6
Loss	8–5	Apr 2002	Barcelona, Spain	International Gold	Clay	Gastón Etlis	Michael Hill Daniel Vacek	4–6, 4–6
Loss	8–6	Jul 2002	Kitzbühel, Austria	International Gold	Clay	Àlex Corretja	Robbie Koenig Thomas Shimada	6–7^(3–7), 4–6
Win	9–6	Sep 2002	Palermo, Italy	International Series	Clay	Luis Lobo	František Čermák Leoš Friedl	6–4, 4–6, 6–2
Loss	9–7	Feb 2003	Buenos Aires, Argentina	International Series	Clay	David Nalbandian	Mariano Hood Sebastián Prieto	2–6, 2–6
Loss	9–8	Apr 2003	Estoril, Portugal	International Series	Clay	Mariano Hood	Mahesh Bhupathi Max Mirnyi	1–6, 2–6
Win	10–8	May 2003	Valencia, Spain	International Series	Clay	Mariano Hood	Brian MacPhie Nenad Zimonjić	6–1, 6–7^(7–9), 6-4
Loss	10–9	Jul 2003	Båstad, Sweden	International Series	Clay	Mariano Hood	Simon Aspelin Massimo Bertolini	7–6^(7–3), 0–6, 4–6
Win	11–9	Sep 2003	Palermo, Italy	International Series	Clay	Mariano Hood	František Čermák Leoš Friedl	7-6^(8–6), 6–7^(3–7), 6–3
Loss	11–10	Oct 2003	Swiss Indoors, Switzerland	International Series	Carpet	Mariano Hood	Mark Knowles Daniel Nestor	4–6, 2–6
Win	12–10	Feb 2004	Buenos Aires, Argentina	International Series	Clay	Mariano Hood	Federico Browne Diego Veronelli	7–5, 6–7^(2–7), 6–4
Loss	12–11	Jul 2003	Kitzbühel, Austria	International Gold	Clay	Martín García	František Čermák Leoš Friedl	3–6, 5–7
Win	13–11	Sep 2004	Bucharest, Romania	International Series	Clay	Mariano Hood	José Acasuso Óscar Hernández	7–6^(7–5), 6–1
Win	14–11	Oct 2004	Palermo, Italy	International Series	Clay	Mariano Hood	Gastón Etlis Martín Rodríguez	7–5, 6–2
Loss	14–12	Oct 2004	Swiss Indoors, Switzerland	International Series	Carpet	Mariano Hood	Bob Bryan Mike Bryan	6–7^(9–11), 2–6
Loss	14–13	Apr 2005	Valencia, Spain	International Series	Clay	Mariano Hood	Fernando González Martín Rodríguez	4–6, 4–6
Win	15–13	May 2005	Sankt Pölten, Austria	International Series	Clay	Paul Hanley	Martin Damm Mariano Hood	6–3, 6–4
Loss	15–14	Aug 2005	Sopot, Poland	International Series	Clay	Sebastián Prieto	Mariusz Fyrstenberg Marcin Matkowski	6–7^(7–9), 4–6
Loss	15–15	Apr 2006	Estoril, Portugal	International Series	Clay	Leoš Friedl	Lukáš Dlouhý Pavel Vízner	3–6, 1–6
Loss	15–16	Jul 2006	Amersfoort, Netherlands	International Series	Clay	Christopher Kas	Alberto Martín Fernando Vicente	4–6, 3–6
Loss	15–17	Jul 2008	Kitzbühel, Austria	International Gold	Clay	Olivier Rochus	James Cerretani Victor Hănescu	3–6, 5–7
Loss	15–18	Feb 2009	Brasil Open, Brazil	250 Series	Clay	Juan Mónaco	Marcel Granollers Tommy Robredo	4–6, 5–7

ATP Challenger and ITF Futures finals

Singles: 5 (2–3)

Legend
ATP Challenger (2–3)
ITF Futures (0–0)

Finals by surface
Hard (0–0)
Clay (2–3)
Grass (0–0)
Carpet (0–0)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Aug 1996	Merano, Italy	Challenger	Clay	Juan-Albert Viloca-Puig	6–7, 4–6
Win	1–1	Aug 1997	Merano, Italy	Challenger	Clay	Vincenzo Santopadre	6–1, 6–4
Win	2–1	Sep 1997	São Paulo, Brazil	Challenger	Clay	Fernando Meligeni	6–4, 1–0 ret.
Loss	2–2	Apr 1998	Paget, Bermuda	Challenger	Clay	Hernán Gumy	6–7, 6–4, 2–6
Loss	2–3	Jun 1998	Braunschweig, Germany	Challenger	Clay	Franco Squillari	2–6, 6–4, 1–6

Doubles: 28 (20–8)

Legend
ATP Challenger (19–7)
ITF Futures (1–1)

Finals by surface
Hard (1–1)
Clay (19–7)
Grass (0–0)
Carpet (0–0)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Jan 1994	Mar del Plata, Argentina	Challenger	Clay	Patricio Arnold	Filippo Messori Federico Mordegan	6–4, 7–5
Win	2–0	May 1994	Bogotá, Colombia	Challenger	Clay	Pablo Campana	Danilo Marcelino Nuno Marques	3–6, 7–6, 7–6
Loss	2–1	Mar 1995	Punta Del Este, Uruguay	Challenger	Clay	Pablo Albano	Christian Miniussi Diego Pérez	6–4, 5–7, 1–6
Win	3–1	Jul 1995	São Paulo, Brazil	Challenger	Hard	Pablo Albano	Otavio Della Marcelo Saliola	6–2, 4–6, 6–1
Win	4–1	May 1996	Ljubljana, Slovenia	Challenger	Clay	Pablo Albano	Rikard Bergh Shelby Cannon	6–1, 3–6, 6–1
Loss	4–2	Jun 1996	Cali, Colombia	Challenger	Clay	Patricio Arnold	Brett Hansen-Dent T J Middleton	4–6, 3–6
Win	5–2	Jul 1996	Ostend, Belgium	Challenger	Clay	David Škoch	Wim Neefs Yuri Soberon	7–6, 6–1
Loss	5–3	Apr 1997	Paget, Bermuda	Challenger	Clay	Daniel Orsanic	Mark Knowles Javier Frana	3–6, 7–6, 3–6
Win	6–3	May 1997	Ljubljana, Slovenia	Challenger	Clay	Daniel Orsanic	David Škoch Fernon Wibier	6–0, 6–4
Win	7–3	Aug 1997	Graz, Austria	Challenger	Clay	Tom Vanhoudt	Alberto Martín Albert Portas	6–1, 6–2
Win	8–3	Oct 1997	Santiago, Chile	Challenger	Clay	Jaime Oncins	Diego del Río Mariano Puerta	6–2, 6–2
Win	9–3	Nov 1997	Palmar, Puerto Rico	Challenger	Clay	Daniel Orsanic	Mariano Hood Sebastián Prieto	7–5, 3–6, 6–3
Win	10–3	Feb 1999	Punta Del Este, Uruguay	Challenger	Clay	Marcelo Filippini	Paulo Carvallo Gonzalo Rodríguez	6–1, 6–4
Loss	10–4	Mar 1999	Salinas, Ecuador	Challenger	Hard	Daniel Orsanic	Mariano Hood Sebastián Prieto	2–6, 6–7
Win	11–4	Nov 2000	Montevideo, Uruguay	Challenger	Clay	Gastón Etlis	Joan Balcells Germán Puentes	6–4, 6–4
Win	12–4	Nov 2000	Buenos Aires, Argentina	Challenger	Clay	Pablo Albano	Sergio Roitman Andrés Schneiter	6–3, 4–6, 6–2
Win	13–4	May 2003	Zagreb, Croatia	Challenger	Clay	Mariano Hood	Simon Aspelin Todd Perry	6–1, 6–3
Win	14–4	Jul 2003	Košice, Slovakia	Challenger	Clay	Mariano Hood	Rubén Ramírez Hidalgo Salvador Navarro	2–1 ret.
Win	15–4	Sep 2004	Szczecin, Poland	Challenger	Clay	Mariano Hood	Óscar Hernández Alberto Martín	6–0, 6–4
Loss	15–5	Sep 2005	Argentina F12, Buenos Aires	Futures	Clay	Diego Cristin	Emiliano Massa Leonardo Mayer	6–7^(4–7), 3–6
Loss	15–6	Oct 2005	Santiago, Chile	Challenger	Clay	Giovanni Lapentti	Daniel Köllerer Oliver Marach	4–6, 3–6
Win	16–6	Nov 2005	Buenos Aires, Argentina	Challenger	Clay	Sebastián Prieto	Rubén Ramírez Hidalgo Santiago Ventura	6–0, 6–4
Win	17–6	Jul 2006	Biella, Italy	Challenger	Clay	Agustín Calleri	Juan Martín del Potro Martín Vassallo Argüello	7–6^(7–5), 6–2
Win	18–6	Oct 2007	Argentina F18, Tandil	Futures	Clay	Lionel Noviski	Máximo González Diego Junqueira	6–3, 6–2
Win	19–6	Jul 2009	Scheveningen, Netherlands	Challenger	Clay	Máximo González	Thomas Schoorel Nick van der Meer	7–5, 6–2
Win	20–6	Aug 2009	San Marino, San Marino	Challenger	Clay	Sebastián Prieto	Johan Brunström Jean-Julien Rojer	7–6^(7–4), 2–6, [10–7]
Loss	20–7	Oct 2009	Buenos Aires, Argentina	Challenger	Clay	Máximo González	Brian Dabul Sergio Roitman	7–6^(7–4), 0–6, [8–10]
Loss	20–8	Nov 2015	Buenos Aires, Argentina	Challenger	Clay	Guido Andreozzi	Horacio Zeballos Julio Peralta	2–6, 5–7

Performance timelines

**Key**
W	F	SF	QF	#R	RR	Q#	DNQ	A	NH

(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (DNQ) did not qualify; (A) absent; (NH) not held; (SR) strike rate (events won / competed); (W–L) win–loss record.

Singles

Tournament	1994	1995	1996	1997	1998	1999	SR	W–L	Win %
Grand Slam Tournaments
Australian Open	A	A	A	A	1R	1R	0 / 2	0–2	0%
French Open	A	A	A	Q1	2R	Q3	0 / 1	1–1	50%
Wimbledon	A	A	A	A	1R	A	0 / 1	0–1	0%
US Open	A	A	A	A	3R	A	0 / 1	2–1	67%
Win–loss	0–0	0–0	0–0	0–0	3–4	0–1	0 / 5	3–5	38%
ATP Tour Masters 1000
Indian Wells Masters	A	A	A	Q1	Q1	A	0 / 0	0–0	–
Miami Open	Q1	A	A	2R	2R	A	0 / 2	1–2	33%
Hamburg	A	A	A	A	Q1	A	0 / 0	0–0	–
Italian Open	A	A	A	A	1R	A	0 / 1	0–1	0%
Stuttgart	A	A	A	Q1	Q1	A	0 / 0	0–0	–
Win–loss	0–0	0–0	0–0	0–1	1–2	0–0	0 / 3	1–3	25%

Doubles

Tournament	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	SR	W–L	Win %
Grand Slam Tournaments
Australian Open	A	1R	3R	A	2R	3R	1R	1R	A	A	A	3R	3R	2R	A	0 / 9	10–9	53%
French Open	SF	1R	1R	2R	QF	3R	QF	1R	3R	1R	A	3R	1R	A	1R	0 / 13	17–13	57%
Wimbledon	A	A	A	1R	3R	1R	1R	2R	1R	1R	A	2R	1R	A	A	0 / 9	4–9	31%
US Open	A	2R	A	2R	2R	1R	3R	2R	1R	1R	A	2R	1R	A	1R	0 / 11	7–11	39%
Win–loss	4–1	1–3	2–2	2–3	7–4	4–4	5–4	2–4	2–3	0–3	0–0	6–4	2–4	1–1	0–2	0 / 42	38–42	48%
ATP Tour Masters 1000
Indian Wells Masters	Q1	1R	A	A	2R	2R	1R	1R	1R	A	A	A	A	A	A	0 / 6	2–6	25%
Miami Open	2R	QF	A	A	2R	3R	1R	1R	2R	A	A	A	1R	A	A	0 / 8	6–8	43%
Monte-Carlo Masters	A	A	A	2R	1R	2R	1R	1R	1R	A	A	A	1R	A	A	0 / 7	2–7	22%
Rome Masters	A	1R	A	1R	SF	2R	A	1R	1R	A	A	A	A	A	A	0 / 6	4–6	40%
Hamburg	A	QF	A	QF	1R	1R	A	1R	1R	A	A	A	NMS			0 / 6	4–6	40%
Cincinnati Masters	A	A	A	A	1R	1R	A	A	A	A	A	A	A	A	A	0 / 2	0–2	0%
Stuttgart	2R	2R	A	Q2	2R	Not Held										0 / 3	3–3	50%
Madrid Masters	Not Held					1R	2R	A	A	A	A	A	A	A	A	0 / 2	1–2	33%
Paris Masters	A	A	A	A	2R	1R	1R	A	A	A	A	2R	A	A	A	0 / 4	2–4	33%
Win–loss	2–2	5–5	0–0	3–3	6–8	5–8	1–5	0–5	1–5	0–0	0–0	1–1	0–2	0–0	0–0	0 / 44	24–44	35%

Mixed doubles

Tournament	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	SR	W–L	Win %
Grand Slam Tournaments
Australian Open	A	1R	A	A	1R	2R	1R	2R	A	A	A	A	A	0 / 5	2–5	29%
French Open	2R	A	A	1R	A	1R	A	QF	1R	A	A	A	A	0 / 5	3–5	38%
Wimbledon	A	A	A	1R	2R	1R	1R	2R	2R	1R	A	A	2R	0 / 8	3–8	27%
US Open	A	A	A	1R	2R	A	A	A	A	A	A	A	A	0 / 2	1–2	33%
Win–loss	1–1	0–1	0–0	0–3	2–3	1–3	0–2	3–3	1–2	0–1	0–0	0–0	1–1	0 / 20	9–20	31%