2003 WTA Tour Championships – Singles
| Singles | |
|---|---|
| 2003 WTA Tour Championships | |
| Champion | Kim Clijsters |
| Runner-up | Amélie Mauresmo |
| Score | 6–2, 6–0 |
| Draw | 8 (RR + elimination) |
| Seeds | 8 |
Defending champion Kim Clijsters successfully defended her title, defeating Amélie Mauresmo in the final, 6–2, 6–0 to win the singles title at the 2003 WTA Tour Championships. It was her second Tour Finals title, her ninth title of the season, and the 19th of her career.