Rafael Nadal (2), Spain, def. Thomaz Bellucci, Brazil, 7-6 (0), 6-2, 6-3.

Andy Murray (4), Britain, def. Nikolay Davydenko, Russia, 6-1, 6-1, 6-4.

Jo-Wilfried Tsonga (5), France, def. Lleyton Hewitt, Australia, 6-3, 6-4, 6-4.

Juan Martin del Potro (9), Argentina, def. Robin Haase, Netherlands, 6-4, 3-6, 7-6 (3), 7-5.

Mardy Fish (10), United States, def. Ruben Ramirez Hidalgo, Spain, 7-6 (3), 7-5, 7-6 (1).

Nicolas Almagro (12), Spain, def. Olivier Rochus, Belgium, 6-7 (4), 3-6, 7-6 (4), 6-2, 6-4.

Feliciano Lopez (14), Spain, lost to Jarkko Nieminen, Finland, 7-6 (4), 3-6, 7-6 (5), 6-4.

Marin Cilic (16), Croatia, def. Cedrik-Marcel Stebe, Germany, 6-4, 3-6, 6-3, 6-2.

Kei Nishikori (19), Japan, def. Mikhail Kukushkin, Kazakhstan, 7-5, 6-3, 6-4.

Bernard Tomic (20), Australia, lost to David Goffin, Belgium, 3-6, 6-3, 6-4, 6-4.

Alexandr Dolgopolov (22), Ukraine, def. Alex Bogomolov Jr., Russia, 6-3, 6-4, 7-5.

Philipp Kohlschreiber (27), Germany, def. Tommy Haas, Germany, 3-6, 7-6 (8), 6-7 (5), 7-6 (1), 6-2.

Kevin Anderson (32), South Africa, lost to Grigor Dimitrov, Bulgaria, 7-5, 7-6 (3), 6-7 (4), 6-3.

Victoria Azarenka (2), Belarus, def. Irina Falconi, United States, 6-1, 6-4.

Petra Kvitova (4), Czech Republic, def. Akgul Amanmuradova, Uzbekistan, 6-4, 6-4.

Serena Williams (6), United States, def. Barbora Zahlavova Strycova, Czech Republic, 6-2, 6-4.

Marion Bartoli (9), France, def. Casey Dellacqua, Australia, 6-2, 6-4.

Vera Zvonareva (12), Russia, def. Mona Barthel, Germany, 2-6, 7-6 (3), 6-3.

Lucie Safarova (19), Czech Republic, lost to Kiki Bertens, Netherlands, 6-3, 6-0.

Roberta Vinci (21), Italy, def. Ashleigh Barty, Australia, 6-2, 6-4.

Francesca Schiavone (24), Italy, def. Laura Robson, Britain, 2-6, 6-4, 6-4.

Zheng Jie (25), China, def. Stephanie Dubois, Canada, 4-6, 6-4, 6-3.

Anabel Medina Garrigues (26), Spain, def. Simona Halep, Romania, 3-6, 6-1, 6-2.

Christina McHale (28), United States, def. Johanna Konta, Britain, 6-7 (4), 6-2, 10-8.

Anastasia Pavlyuchenkova (31), Russia, def. Sofia Arvidsson, Sweden, 6-1, 6-2.

Svetlana Kuznetsova (32), Russia, lost to Yanina Wickmayer, Belgium, 6-2, 6-3.