| 2003 Results | |||
| AAPT | |||
| Rd | Opponent | W/L | Score |
| 1 | Kristof Vliegen | L | 6-3, 4-6, 3-6 |
| adidas International | |||
| Rd | Opponent | W/L | Score |
| 1 | Wayne Ferreira | L | 2-6, 4-6 |
| Australian Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Gaston Gaudio | L | 5-7, 5-7, 2-6 |
| Milan Indoors | |||
| Rd | Opponent | W/L | Score |
| 1 | Sjeng Schalken | W | 6-4, 6-3 |
| 2 | Martin Verkerk | L | 3-6, 4-6 |
| Open 13 | |||
| Rd | Opponent | W/L | Score |
| 1 | Raemon Sluiter | L | 6-7 (4-7), 6-7 (6-8) |
| ABN AMRO World Tennis Tournament | |||
| Rd | Opponent | W/L | Score |
| 1 | Roger Federer | L | 6-3, 3-6, 4-6 |
| Franklin Templeton Tennis Classic | |||
| Rd | Opponent | W/L | Score |
| 1 | Andre Agassi | W | 6-7 (6-8), 6-4, 6-1 |
| 2 | James Blake | L | 6-7 (5-7), 7-6 (7-1), 2-6 |
| Pacific Life Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Andy Roddick | L | 4-6, 4-6 |
| NASDAQ-100 Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Michael Llodra | W | 6-4, 6-7 (5-7), 6-3 |
| 2 | Gustavo Kuerten | W | 6-3, 6-4 |
| 3 | Mark Philippoussis | L | 7-6 (8-6), 6-7 (3-7), 3-6 |
| Davis Cup | |||
| Rd | Opponent | W/L | Score |
| QF | Lleyton Hewitt | L | 4-6, 2-6, 7-5, 4-6 |
| U.S. Men's Clay Court Championships | |||
| Rd | Opponent | W/L | Score |
| 1 | Paul Goldstein | L | 1-6, 6-7 (7-9) |
| Italia Masters | |||
| Rd | Opponent | W/L | Score |
| 1 | Dominik Hrbaty | L | 3-6, 3-6 |
| ARAG ATP World Team Championship | |||
| Rd | Opponent | W/L | Score |
| 1 | Gaston Gaudio | L | 6-4, 4-6, 6-7 (4-7) |
| 1 | Nicolas Massu | L | 2-6, 3-6 |
| 1 | Lars Burgsmuller | L | 7-5, 4-6, 4-6 |
| French Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Arnaud Clement | L | 3-6, 4-6, 2-6 |
| The Stella Artois Championships | |||
| Rd | Opponent | W/L | Score |
| 1 | Jan-Michael Gambill | L | 6-7 (5-7), 6-7 (5-7) |
| The Wimbledon Championships | |||
| Rd | Opponent | W/L | Score |
| 1 | Sebastien Grosjean | L | 6-4, 3-6, 4-6, 6-7 (4-7) |
| RCA Championships | |||
| Rd | Opponent | W/L | Score |
| 1 | Jan Vacek | W | 7-6 (7-5), 3-6, 6-3 |
| 2 | Jan-Michael Gambill | L | 2-6, 2-6 |
| Legg Mason Tennis Classic | |||
| Rd | Opponent | W/L | Score |
| 1 | Jaymon Crabb | W | 6-4, 6-3 |
| 2 | Yevgeny Kafelnikov | L | 3-6, 6-2, 3-6 |
| Western & Southern Financial Group Masters | |||
| Rd | Opponent | W/L | Score |
| 1 | Felix Mantilla | W | 6-3, 7-6 (7-5) |
| 2 | Max Mirnyi | L | 6-7 (2-7), 4-6 |
| U.S. Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Albert Portas | W | 6-2, 6-3, 6-1 |
| 2 | Nicolas Massu | L | 3-6, 2-6, 5-7 |
| Heineken Open Shanghai | |||
| Rd | Opponent | W/L | Score |
| 1 | Nicolas Kiefer | L | 6-1, 3-6, 3-6 |
| Open de Moselle | |||
| Rd | Opponent | W/L | Score |
| 1 | Davide Sanguinetti | L | 5-7, 3-6 |
| Grand Prix de Tennis de Lyon | |||
| Rd | Opponent | W/L | Score |
| 1 | Wayne Ferreira | W | 7-6 (9-7), 7-6 (7-5) |
| 2 | Xavier Malisse | L | 3-6, 4-6 |
| Tennis Masters Madrid | |||
| Rd | Opponent | W/L | Score |
| 1 | Yevgeny Kafelnikov | W | 6-3, retired (foot) |
| 2 | Felix Mantilla | L | 2-6, 6-7 (3-7) |
| Stockholm Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Hicham Arazi | W | 7-5, 6-3 |
| 2 | Kenneth Carlsen | W | 6-7 (4-7), 6-4, 6-4 |
| QF | Robby Ginepri | W | 6-3, 6-4 |
| SF | Mardy Fish | L | 4-6, 5-7 |