2004 WTA Tour Championships – Singles
| Singles | |
|---|---|
| 2004 WTA Tour Championships | |
| Champion | Maria Sharapova |
| Runner-up | Serena Williams |
| Score | 4–6, 6–2, 6–4 |
| Draw | 8 (RR + elimination) |
| Seeds | 8 |
Maria Sharapova defeated Serena Williams in the final, 4–6, 6–2, 6–4 to win the singles tennis title at the 2004 WTA Tour Championships. This was also the second and final time in which Sharapova defeated Williams, as she would lose their next 19 encounters.
Kim Clijsters was the two-time reigning champion, but did not qualify this year due to a long-term wrist injury.
Sharapova, Svetlana Kuznetsova and Vera Zvonareva made their debuts at the event.