2003 Tennis Masters Cup – Singles
| Singles | |
|---|---|
| 2003 Tennis Masters Cup | |
| Champion | Roger Federer |
| Runner-up | Andre Agassi |
| Score | 6–3, 6–0, 6–4 |
| Draw | 8 |
Roger Federer defeated Andre Agassi in the final, 6–3, 6–0, 6–4 to win the singles tennis title at the 2003 Tennis Masters Cup. It was the first of an eventual then-record six Tour Finals titles for Federer.
Lleyton Hewitt was the reigning champion, but did not qualify this year.