Kim Clijsters was the defending champion, but withdrew due to an abdominal injury. Maria Sharapova won the tournament, defeating Jelena Janković 4–6, 7–6(7–3), 6–3 in the final. Seeds The top eight seeds received a bye into the second round. Qualifying Main draw Finals Top half Section 1 Section 2 Bottom half Section 3 Section 4 References Main Draw Western and Southern Open 2011 Western & Southern Open