2015 ATP World Tour Finals – Singles

Three-time defending champion Novak Djokovic defeated Roger Federer in the final, 6–3, 6–4 to win the singles tennis title at the 2015 ATP Finals. It was his fifth Tour Finals title. With the win, Djokovic became the first player to win the event four consecutive times.

Seeds
• # 🇷🇸 Novak Djokovic (champion)

• # 🇬🇧 Andy Murray (round robin)

• # Roger Federer (final)

• # Stan Wawrinka (semifinals)

• # 🇪🇸 Rafael Nadal (semifinals)

• # 🇨🇿 Tomáš Berdych (round robin)

• # 🇪🇸 David Ferrer (round robin)

• # 🇯🇵 Kei Nishikori (round robin)

Alternates
• # 🇫🇷 Richard Gasquet (Did not play)

• # 🇺🇸 John Isner (Did not play)

Group Stan Smith
''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, then percentage of games won, then head-to-head records; 5. ATP rankings.''

Group Ilie Năstase
''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, then percentage of games won, then head-to-head records; 5. ATP rankings.''