2003 WTA Tour Championships – Singles
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.
Seeds
Note:- Serena Williams had qualified but pulled out due to left knee surgery.
- Lindsay Davenport had qualified but pulled out due to left foot surgery.
- Venus Williams had qualified but pulled out due to abdominal injury.