2011 ATP World Tour Finals – Singles
| Singles | |
|---|---|
| 2011 ATP World Tour Finals | |
| Champion | Roger Federer |
| Runner-up | Jo-Wilfried Tsonga |
| Score | 6–3, 6–7(6–8), 6–3 |
Defending champion Roger Federer defeated Jo-Wilfried Tsonga in the final, 6–3, 6–7(6–8), 6–3 to win the singles tennis title at the 2011 ATP World Tour Finals. It was a then-record sixth Tour Finals title and his 70th career title.
Mardy Fish and Janko Tipsarević (as an alternate who replaced Andy Murray) made their debuts at the event.