Stefan Koubek
| Country (sports) | Austria |
|---|---|
| Residence | Vienna, Austria |
| Born | 2 January 1977 Klagenfurt, Austria |
| Height | 1.75 m (5 ft 9 in) |
| Turned pro | 1994 |
| Retired | 2011 |
| Plays | Left-handed (two-handed backhand) |
| Prize money | $3,365,024 |
| Singles | |
| Career record | 215–253 |
| Career titles | 3 |
| Highest ranking | No. 20 (13 March 2000) |
| Grand Slam singles results | |
| Australian Open | QF (2002) |
| French Open | 4R (1999) |
| Wimbledon | 2R (2000, 2002, 2003, 2004, 2009) |
| US Open | 3R (2004, 2007) |
| Doubles | |
| Career record | 20–41 |
| Career titles | 1 |
| Highest ranking | No. 94 (23 July 2007) |
| Grand Slam doubles results | |
| Australian Open | 1R (2007, 2008) |
| French Open | 1R (2007) |
| Wimbledon | 1R (2009) |
| US Open | 1R (2003, 2007) |
| Last updated on: 17 April 2022. | |
Stefan Koubek (born 2 January 1977) is a retired tennis player from Austria. Koubek played left-handed with a double-handed backhand. His idol when growing up was Thomas Muster. Koubek won three titles, two of which came on hardcourts; despite this, he said his favorite surface was clay.
Koubek reached the quarterfinals of the 2002 Australian Open and the 2002 Hamburg Masters, attaining a career-high singles ranking of World No. 20 in March 2000. Koubek tested positive for glucocorticosteroids at the 2004 French Open after receiving an injection for an injured wrist; he was subsequently suspended for three months.
His nickname is Cooley or Stef.