| Player Info |
| Coria enjoyed his best season ever with four ATP titles in 2003. He was the first Argentine to qualify for the year-end championships (the Tennis Masters Cup, in Houston, Texas) since Jose-Luis Clerc in 1983. |
| 2003 Results | |||
| Heineken Open | |||
| Rd | Opponent | W/L | Score |
| 1 | David Sanchez | W | 2-6, 6-2, 6-4 |
| 2 | Fernando Vicente | W | 6-2, 6-2 |
| QF | Gustavo Kuerten | L | 5-7, 6-4, 2-6 |
| Australian Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Francisco Clavet | W | 6-4, 7-5, 6-1 |
| 2 | Guillermo Canas | W | 6-2, 4-6, 6-4, 6-4 |
| 3 | Jarkko Nieminen | W | 7-5, 6-2, 6-2 |
| 4 | Andre Agassi | L | 1-6, 1-3, retired |
| Copa AT&T | |||
| Rd | Opponent | W/L | Score |
| 1 | Jose Acasuso | W | 6-3, 3-6, 6-2 |
| 2 | Mariano Zabaleta | W | 6-4, 2-6, 6-3 |
| QF | David Nalbandian | W | 3-6, 6-3, 7-6 (7-5) |
| SF | Gaston Gaudio | W | 6-3, 1-6, 6-3 |
| F | Carlos Moya | L | 3-6, 6-4, 4-6 |
| International Tennis Championships | |||
| Rd | Opponent | W/L | Score |
| 1 | Sargis Sargsian | L | 5-7, 2-6 |
| Pacific Life Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Davide Sanguinetti | W | 6-0, 2-6, 6-0 |
| 2 | Alex Corretja | W | 6-2, 6-1 |
| 3 | Lleyton Hewitt | L | 7-6 (7-3), 4-6, 3-6 |
| NASDAQ-100 Open | |||
| Rd | Opponent | W/L | Score |
| 2 | Anthony Dupuis | W | 6-0, 6-4 |
| 3 | Davide Sanguinetti | W | 6-3, 7-6 (7-4) |
| 4 | Albert Costa | L | 5-7, 6-3, 3-6 |
| Tennis Masters Monte Carlo | |||
| Rd | Opponent | W/L | Score |
| 1 | Jose Acasuso | W | 6-2, 6-2 |
| 2 | James Blake | W | 6-0, 6-7 (3-7), 6-3 |
| 3 | Rafael Nadal | W | 7-6 (7-3), 6-2 |
| QF | Juan Ignacio Chela | W | 6-1, 6-1 |
| SF | Carlos Moya | W | 7-6 (7-3), 6-2 |
| F | Juan Carlos Ferrero | L | 2-6, 2-6 |
| Open Seat Godo | |||
| Rd | Opponent | W/L | Score |
| 1 | Fernando Verdasco | W | 6-2, 6-2 |
| 2 | Dominik Hrbaty | L | 3-4, retired (abdominal hernia) |
| Italia Masters | |||
| Rd | Opponent | W/L | Score |
| 1 | Tim Henman | W | 6-2, 6-1 |
| 2 | Victor Hanescu | W | 6-1, 7-6 (8-6) |
| 3 | Ivan Ljubicic | L | 4-6, 3-6 |
| Tennis Masters Hamburg | |||
| Rd | Opponent | W/L | Score |
| 1 | Vincent Spadea | W | 6-2, 6-2 |
| 2 | Jarkko Nieminen | W | 6-3, 6-4 |
| 3 | Mikhail Youzhny | W | 6-3, 6-3 |
| QF | Mark Philippoussis | W | 6-2, 6-0 |
| SF | Gaston Gaudio | W | 6-3, 6-7 (3-7), 6-0 |
| F | Agustin Calleri | W | 6-3, 6-4, 6-4 |
| French Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Andre Sa | W | 6-3, 6-1, 6-1 |
| 2 | Nicolas Kiefer | W | 6-3, 5-7, 6-3, 6-1 |
| 3 | Attila Savolt | W | 6-4, 6-1, 6-1 |
| 4 | Mariano Zabaleta | W | 6-4, 7-6 (7-4), 5-7, 6-7 (4-7), 6-3 |
| QF | Andre Agassi | W | 4-6, 6-3, 6-2, 6-4 |
| SF | Martin Verkerk | L | 6-7 (4-7), 4-6, 6-7 (0-7) |
| The Wimbledon Championships | |||
| Rd | Opponent | W/L | Score |
| 1 | Olivier Rochus | L | 5-7, 6-7 (4-7), 3-6 |
| Mercedes Cup | |||
| Rd | Opponent | W/L | Score |
| 2 | Paul-Henri Mathieu | W | 7-5, 6-3 |
| 3 | David Ferrer | W | 6-1, 6-1 |
| QF | Mikhail Youzhny | W | 6-0, 6-0 |
| SF | Feliciano Lopez | W | 6-4, 6-0 |
| F | Tommy Robredo | W | 6-2, 6-2, 6-1 |
| Generali Open | |||
| Rd | Opponent | W/L | Score |
| 2 | Andreas Vinciguerra | W | 6-4, 6-3 |
| 3 | Olivier Mutis | W | 6-1, 6-0 |
| QF | Juan Ignacio Chela | W | 6-3, 6-1 |
| SF | Feliciano Lopez | W | 6-1, 6-2 |
| F | Nicolas Massu | W | 6-1, 6-4, 6-2 |
| Idea Prokom Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Victor Hanescu | W | 6-3, 6-4 |
| 2 | Christophe Rochus | W | 6-1, 6-0 |
| QF | Olivier Mutis | W | 6-3, 6-4 |
| SF | Luis Horna | W | 6-2, 6-2 |
| F | David Ferrer | W | 7-5, 6-1 |
| Tennis Masters Canada | |||
| Rd | Opponent | W/L | Score |
| 1 | Feliciano Lopez | L | 3-6, retired |
| Western & Southern Financial Group Masters | |||
| Rd | Opponent | W/L | Score |
| 1 | Tim Henman | W | 6-3, 4-6, 6-4 |
| 2 | Yevgeny Kafelnikov | W | 6-0, 5-4, retired |
| 3 | Mikhail Youzhny | W | 6-2, 6-1 |
| QF | Max Mirnyi | L | 2-6, 5-7 |
| U.S. Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Mariano Puerta | W | 6-4, 6-3, 6-1 |
| 2 | Bohdan Ulihrach | W | 6-2, 6-1, 6-4 |
| 3 | Gregory Carraz | W | 7-5, 6-1, 7-5 |
| 4 | Jonas Bjorkman | W | 6-2, 6-3, 4-6, 6-2 |
| QF | Andre Agassi | L | 4-6, 3-6, 5-7 |
| Davidoff Swiss Indoors | |||
| Rd | Opponent | W/L | Score |
| 1 | Fabrice Santoro | W | 5-7, 6-3, 6-0 |
| 2 | Michael Llodra | W | 6-2, 6-7 (5-7), 7-6 (7-4) |
| QF | Feliciano Lopez | W | 6-1, 6-2 |
| SF | Ivan Ljubicic | W | 6-4, 6-4 |
| F | David Nalbandian | W | walkover |
| BNP Paribas Masters | |||
| Rd | Opponent | W/L | Score |
| 2 | Feliciano Lopez | W | 6-3, 3-6, 6-3 |
| 3 | Andrei Pavel | L | -walkover (-fever) |
| Tennis Masters Cup | |||
| Rd | Opponent | W/L | Score |
| 1 | Carlos Moya | W | 6-2, 6-3 |
| 1 | Rainer Schuettler | L | 3-6, 6-4, 2-6 |
| 1 | Andy Roddick | L | 3-6, 7-6 (7-4), 3-6 |
