John-Laffnie de Jager
| Country (sports) |
 South Africa
|
|---|---|
| Residence | Ermelo, Transvaal, South Africa |
| Born |
17 March 1973 Johannesburg, South Africa |
| Height | 1.93 m (6 ft 4 in) |
| Turned pro | 1992 |
| Retired | 2003 |
| Plays | Right-handed |
| Prize money | $1,357,700 |
| Singles | |
| Career record | 0–3 |
| Career titles | 0 |
| Highest ranking | No. 313 (12 October 1992) |
| Grand Slam Singles results | |
| Wimbledon | 1R (1992) |
| Doubles | |
| Career record | 246–258 |
| Career titles | 7 |
| Highest ranking | No. 11 (31 July 2000) |
| Grand Slam Doubles results | |
| Australian Open | SF (1993) |
| French Open | 2R (1993, 1998) |
| Wimbledon | SF (2000) |
| US Open | SF (1998, 2001) |
| Other doubles tournaments | |
| Tour Finals | RR (1999) |
| Olympic Games | SF - 4th (2000) |
| Mixed doubles | |
| Grand Slam Mixed Doubles results | |
| Australian Open | F (1997) |
| French Open | F (1995) |
| Wimbledon | QF (1997, 2000) |
| US Open | SF (1994) |
John-Laffnie de Jager (born 17 March 1973) is a South African former tour professional tennis player. A doubles specialist, de Jager reached the semi-finals for three different grand slam tournaments three times in three different years partnering three different fellow South African players. de Jager is the current non-playing captain of the South Africa Davis Cup team.
A native of Johannesburg, de Jager turned professional in 1992 during which year he played his only tour singles. He won two of five matches he played on the challenger circuit and reached through qualifying the main draw at Wimbledon, where he lost in the first round to future champion Richard Krajicek, 7–5 6–1 6–2. He played but one other event in singles, a challenger in Dublin in October, before focussing his tennis exclusively on doubles. His career high singles ranking stood at World No. 313, reached in October.
De Jager won back-to-back challenger events in doubles in September 1991, partnering compatriots, in Madeira partnering Byron Talbot and in Jerusalem with Christo van Rensburg. He played some half dozen times with Van Rensburg in 1991-2 and some dozen times, but with limited success, with Johan de Beer. He won two more challenger events the following year, in June partnering Zimbabwean Byron Black and in November with Capetonian Marius Barnard. 1993 saw de Jager reach his first of three grand slam semis, in partnership with yet another South African, Marcos Ondruska. Together they reached the second round at the Roland Garros and the third round at Wimbledon. In October, de Jager reached his first Grand Prix event final, in Lyon partnering still another South African and Capetonian, Stefan Kruger.
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