2011 Rogers Cup – Women's singles

Serena Williams defeated Samantha Stosur in the final, 6–4, 6–2 to win the women's singles tennis title at the 2011 Canadian Open. It was her second Canadian Open title.

Caroline Wozniacki was the defending champion, but lost to Roberta Vinci in the second round.

Seeds
The top eight seeds receive a bye into the second round. • # Caroline Wozniacki (second round)

• # 🇧🇪 Kim Clijsters (second round, retired because of an abdominal injury)

• # 🇷🇺 Vera Zvonareva (third round)

• # 🇧🇾 Victoria Azarenka (semifinals)

• # 🇷🇺 Maria Sharapova (third round)

• # 🇨🇳 Li Na (third round)

• # 🇨🇿 Petra Kvitová (third round)

• # 🇮🇹 Francesca Schiavone (third round)

• # 🇫🇷 Marion Bartoli (first round)

• # 🇦🇺 Samantha Stosur (final)

• # 🇩🇪 Andrea Petkovic (quarterfinals)

• # 🇷🇺 Svetlana Kuznetsova (first round)

• # 🇵🇱 Agnieszka Radwańska (semifinals)

• # 🇷🇺 Anastasia Pavlyuchenkova (first round)

• # 🇷🇸 Jelena Janković (first round)

• # 🇸🇰 Dominika Cibulková (first round, retired because of a left abdominal strain)