Serena Williams (1) def. Anna Chakvetadze 6-0, 6-1
Caroline Wozniacki (3) def. Kai-Chen Chang 6-4, 6-3
Agnieszka Radwanska (7) def. Alberta Brianti 6-2, 6-0
Na Li (9) def. Kurumi Nara 6-2, 6-4
Flavia Pennetta (10) def. Monica Niculescu 6-1, 6-1
Victoria Azarenka (14) def. Bojana Jovanovski 6-1, 6-4
Maria Sharapova (16) def. Ioana Raluca Olaru 6-1, 6-4
Klara Zakopalova def. Aravane Rezai (18) 5-7, 6-3, 6-3
Anastasia Rodionova def. Svetlana Kuznetsova (19) 6-4, 2-6, 6-4
Petra Kvitova def. Jie Zheng (23) 6-4, 2-6, 6-2
Barbora Zahlavova Strycova def. Daniela Hantuchova (24) 1-6, 6-2, 6-4
Anastasia Pavlyuchenkova (29) def. Roberta Vinci 6-2, 7-6 (7-1)
Alexandra Dulgheru (31) def. Romina Oprandi 6-2, 6-0
Sara Errani (32) def. Arantxa Parra Santonja 6-2, 6-2
Dominika Cibulkova def. Ayumi Morita 6-7 (4-7), 7-6 (7-2), 7-5
Kaia Kanepi def. Edina Gallovits 6-4, 7-5