2011 Rogers Cup – Men's singles

Novak Djokovic defeated Mardy Fish in the final, 6–2, 3–6, 6–4 to win the men's singles tennis title at the 2011 Canadian Open. It was his 10th career Masters title, and he became the first man to win five Masters titles in the same year.

Andy Murray was the two-time defending champion, but lost to Kevin Anderson in the second round.

Seeds
The top eight seeds receive a bye into the second round. • # 🇷🇸 Novak Djokovic (champion)

• # 🇪🇸 Rafael Nadal (second round)

• # Roger Federer (third round)

• # 🇬🇧 Andy Murray (second round)

• # 🇫🇷 Gaël Monfils (quarterfinals)

• # 🇺🇸 Mardy Fish (final)

• # 🇨🇿 Tomáš Berdych (quarterfinals)

• # 🇪🇸 Nicolás Almagro (quarterfinals)

• # 🇫🇷 Gilles Simon (first round)

• # 🇫🇷 Richard Gasquet (third round)

• # 🇷🇺 Mikhail Youzhny (first round)

• # 🇷🇸 Viktor Troicki (third round)

• # 🇫🇷 Jo-Wilfried Tsonga (semifinals, retired)

• # Stan Wawrinka (quarterfinals)

• # 🇪🇸 Fernando Verdasco (second round)

• # 🇦🇷 Juan Martín del Potro (second round)