Ana Ivanovic after defeating Shenay Perry

Maria Sharapova hits a return against compatriot Maria Kirilenko

Maria Kirilenko hits a return against Maria Sharapova - Kirilenko defeated Sharapova by 7-6, 3-6, 6-4

Rafael Nadal reacts during his match against Ivo Karlovic

Ana Ivanovic hits a return against Gisela Dulko of Argentina

Caroline Wozniacki in action during her 2nd round match

Li Na celebrates her quarter final vistory over Venus Williams