2011 ATP World Tour Finals – Singles

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.

Seeds
• # 🇷🇸 Novak Djokovic (round robin)

• # 🇪🇸 Rafael Nadal (round robin)

• # Andy Murray (round robin, withdrew because of a groin injury)

• # Roger Federer (champion)

• # 🇪🇸 David Ferrer (semifinals)

• # 🇫🇷 Jo-Wilfried Tsonga (final)

• # 🇨🇿 Tomáš Berdych (semifinals)

• # 🇺🇸 Mardy Fish (round robin)

Alternates
• # 🇷🇸 Janko Tipsarević (replaced Murray, round robin)

• # 🇪🇸 Nicolás Almagro (Did not play)

Group A
''Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.''

Group B
''Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.''