2005 Tennis Masters Cup – Singles
| Singles | |
|---|---|
| 2005 Tennis Masters Cup | |
| Champion | David Nalbandian |
| Runner-up | Roger Federer |
| Score | 6–7(4–7), 6–7(11–13), 6–2, 6–1, 7–6(7–3) |
| Draw | 8 |
David Nalbandian defeated the two-time defending champion Roger Federer in the final, 6–7(4–7), 6–7(11–13), 6–2, 6–1, 7–6(7–3) to win the singles tennis title at the 2005 Tennis Masters Cup.
Mariano Puerta's round-robin result was disqualified upon his doping charge in December 2005.