The 2003 French Open was the second Grand Slam event of 2003 and the 102nd edition of the French Open. It took place at the Stade Roland Garros in Paris, France, from May 26 through June 8, 2003.
Both Albert Costa and Serena Williams were unsuccessful in their title defences, both being defeated in the semi-finals by eventual champions Juan Carlos Ferrero and Justine Henin-Hardenne respectively. Ferrero won his first Grand Slam title, defeating Martin Verkerk in the final, and Henin-Hardenne, who had previously won the event in 1997 as a junior, won after defeating Serena Williams, who had won the previous four Grand Slam events, in the semi-final and compatriot and rival Kim Clijsters in the final in straight sets. For Henin-Hardenne, it was the first of seven Grand Slam titles, and the first of four French Open titles.
See main article: 2003 French Open – Men's singles. 
Juan Carlos Ferrero defeated 
Martin Verkerk, 6–1, 6–3, 6–2
See main article: 2003 French Open – Women's singles. 
Justine Henin-Hardenne defeated Kim Clijsters, 6–0, 6–4
See main article: 2003 French Open – Men's doubles. 
Mike Bryan / Bob Bryan defeated Paul Haarhuis / 
Yevgeny Kafelnikov, 7–6, 6–3
See main article: 2003 French Open – Women's doubles. Kim Clijsters / 
Ai Sugiyama defeated Virginia Ruano Pascual / 
Paola Suárez, 6–7(5), 6–2, 9–7
See main article: 2003 French Open – Mixed doubles. Lisa Raymond / Mike Bryan defeated Elena Likhovtseva / 
Mahesh Bhupathi, 6–3, 6–4
| Men's singles | |||||
| 1. | Lleyton Hewitt (AUS) | lost to | Tommy Robredo (ESP) | 3rd round | |
| 2. | Andre Agassi (USA) | lost to | [7]Guillermo Coria (ARG) | Quarterfinal | |
| 3. | Juan Carlos Ferrero (ESP) | beat | Martin Verkerk (NED) | Final | |
| 4. | Carlos Moyá (ESP) | lost to | Martin Verkerk (NED) | Quarterfinal | |
| 5. | Roger Federer (SUI) | lost to | Luis Horna (PER) | 1st round | |
| Women's singles | |||||
| 1. | Serena Williams (USA) | lost to | [4]Justine Henin-Hardenne (BEL) | Semi-final | |
| 2. | Kim Clijsters (BEL) | lost to | [4]Justine Henin-Hardenne (BEL) | Final | |
| 3. | Venus Williams (USA) | lost to | [22]Vera Zvonareva (RUS) | 4th round | |
| 4. | Justine Henin-Hardenne (BEL) | beat | [2]Kim Clijsters (BEL) | Final | |
| 5. | Amélie Mauresmo (FRA) | lost to | [1]Serena Williams (USA) | Quarterfinal | |
See main article: 2003 French Open – Boys' singles. Stanislas Wawrinka defeated Brian Baker, 7–5, 4–6, 6–3
See main article: 2003 French Open – Girls' singles. Anna-Lena Grönefeld defeated Vera Dushevina, 6–4, 6–4
György Balázs / 
Dudi Sela defeated 
Kamil Čapkovič / 
Lado Chikhladze, 5–7, 6–1, 6–2
Marta Fraga Pérez / Adriana González Peñas defeated 
Kateřina Böhmová / Michaëlla Krajicek, 6–0, 6–3