|Full name||Rex Noel Hartwig|
|Born||2 September 1929|
Culcairn, New South Wales, Australia
|Turned pro||1950 (amateur tour)|
|Plays||Right-handed (1-handed backhand)|
|Highest ranking||No. 5 (1954, Lance Tingay)|
|Grand Slam singles results|
|Australian Open||F (1954)|
|French Open||4R (1953, 1954)|
|US Open||F (1954)|
|Other pro events|
|Grand Slam doubles results|
|Australian Open||W (1954)|
|Wimbledon||W (1954, 1955)|
|US Open||W (1953)|
|Grand Slam mixed doubles results|
|Australian Open||W (1953, 1954)|
|French Open||F (1954)|
|Davis Cup||W (1953, 1955 )|
Rex Noel Hartwig (born 2 September 1929) is an Australian former tennis player.
Rex Hartwig was born on 2 September 1929 in Culcairn, New South Wales. Both parents played tennis and at age 10 Hartwig played and won in a local tournament with his father. When he was 13 he began competing in afternoon competitions and took a job managing tennis courts in Albury. He formed a doubles team with Allan Kendall jr. and the team won the NSW, Victorian and Australian Junior titles.
Hartwig was ranked World No. 5 in both 1954 and 1955 by Lance Tingay of The Daily Telegraph.
He won the doubles in Wimbledon twice: In 1954 with Mervyn Rose and in 1955 with Lew Hoad.
In 1953 he also won the doubles with Mervyn Rose and the mixed doubles with Julia Sampson Hayward. In 1954 he again won the mixed doubles title in Melbourne, this time partnering Thelma Coyne Long.
In 1953 he won the doubles title at the US Championships with Mervyn Rose, defeating Gardnar Mulloy and Bill Talbert in the final that lasted 77 minutes.
Playing singles he made the final in 1954 but lost to Vic Seixas.
Hartwig was member of the Australian Davis Cup team in 1953, 1954 and 1955. In 1953 he played the doubles match with Lew Hoad in the challenge round against the USA and lost to Vic Seixas and Tony Trabert. This would turn out to be Hartwig's only Davis Cup defeat. In 1954 he defeated Seixas in the challenge round that Australia lost to the USA. In 1955 he made a significant contribution towards Australia's Cup win, playing 11 matches in six ties and winning all of them. He compiled a 12–1 win–loss record in the Davis Cup (6–0 singles, 6–1 doubles).
In November 1954 Hartwig won the singles title at the New South Wales Championships in Sydney. In the final he defeated countryman Mervyn Rose in three straight sets.
In November 1955 Hartwig turned professional by signing a contract with tennis promoter Jack Kramer for a fixed amount of $30,000 plus a percentage of the gate receipts of the professional tour.
Hartwig was known for his well-timed groundstrokes and his crisp and accurate volleys. Australian tennis player and coach Harry Hopman characterized Hartwig as a great stylist.
|Loss||1954||Australian Championships||Grass||Mervyn Rose||2–6, 6–0, 4–6, 2–6|
|Loss||1954||U.S. Championships||Grass||Vic Seixas||6–3, 2–6, 4–6, 4–6|
|Loss||1953||Wimbledon Championships||Grass||Mervyn Rose|| Lew Hoad
|4–6, 5–7, 6–4, 5–7|
|Win||1953||U.S. Championships||Grass||Mervyn Rose|| Gardnar Mulloy
|6–4, 4–6, 6–2, 6–4|
|Win||1954||Australian Championships||Grass||Mervyn Rose|| Neale Fraser
|6–3, 6–4, 6–2|
|Win||1954||Wimbledon Championships||Grass||Mervyn Rose|| Vic Seixas
|6–4, 6–4, 3–6, 6–4|
|Win||1955||Wimbledon Championships||Grass||Lew Hoad|| Neale Fraser
|7–5, 6–4, 6–3|
|Win||1953||Australian Championships||Grass||Julia Sampson|| Maureen Connolly
|Loss||1953||U.S. Championships||Grass||Julia Sampson|| Doris Hart
|2–6, 6–4, 4–6|
|Win||1954||Australian Championships||Grass||Thelma Coyne Long|| Beryl Penrose
|4–6, 6–1, 6–2|
|Loss||1954||French Championships||Clay||Jacqueline Patorni|| Maureen Connolly