| Champ: |  Andy Murray |
| Runner: |  Novak Djokovic |
| Score: | 6–4, 4–6, 6–3 |
See main article: article and 2015 Rogers Cup.
Andy Murray defeated Novak Djokovic in the final, 6–4, 4–6, 6–3, to win the men's singles tennis title at the 2015 Canadian Open.[1] It was Murray's first win against Djokovic since the 2013 Wimbledon final, having lost eight consecutive matches to him in that span.[2]
Jo-Wilfried Tsonga was the defending champion, but lost in the quarterfinals to Murray.
The top eight seeds received a bye into the second round.
See also: 1 and 1. Novak Djokovic (final)
See also: 2 and 4. Andy Murray (champion)
See also: 3 and 2. Stan Wawrinka (second round, retired because of a back injury)
See also: 4 and 3. 
Kei Nishikori (semifinals)
See also: 5 and 1. 
Tomáš Berdych (second round)
See also: 6 and 4. Marin Čilić (second round)
See also: 7 and 3. 
Rafael Nadal (quarterfinals)
See also: 8 and 2. 
Milos Raonic (second round)
See also: 9 and 3. 
Gilles Simon (second round)
See also: 10 and 4. Jo-Wilfried Tsonga (quarterfinals)
See also: 11. Richard Gasquet (withdrew due to an illness)
See also: 12 and 1. Kevin Anderson (first round)
See also: 13 and 3. 
David Goffin (third round)
See also: 14 and 1. Grigor Dimitrov (second round)
See also: 15 and 4. Gaël Monfils (second round)
See also: 16 and 2. 
John Isner (quarterfinals)