David Ferrer (7), Spain, def. Dustin Brown, Germany, 7-6 (5), 6-4, 6-4.

Milos Raonic (21), Canada, def. Santiago Giraldo, Colombia, 6-4, 6-4, 6-4.

Stanislas Wawrinka (25), Switzerland, lost to Jurgen Melzer, Austria, 3-6, 7-6 (2), 2-6, 6-4, 8-6.

Andy Roddick (30), United States, def. Jamie Baker, Britain, 7-6 (1), 6-4, 7-5.

Novak Djokovic (1), Serbia, def. Ryan Harrison, United States, 6-4, 6-4, 6-4.

Roger Federer (3), Switzerland, def. Fabio Fognini, Italy, 6-1, 6-3, 6-2.

Janko Tipsarevic (8), Serbia, def. Ryan Sweeting, United States, 5-7, 7-5, 6-4, 6-2.

Nicolas Almagro (12), Spain, def. Guillaume Rufin, France, 6-2, 5-7, 6-2, 6-4.

Juan Monaco (15), Argentina, def. Jeremy Chardy, France, 6-2, 3-6, 6-3, 7-6 (3).

Richard Gasquet (18), France, def. Ruben Bemelmans, Belgium, 6-3, 6-4, 6-4.

Mikhail Youzhny (26), Russia, def. Inigo Cervantes, Spain, 6-1, 6-3, 6-4.

Julien Benneteau (29), France, def. Michael Russell, United States, 7-6 (4), 2-6, 6-4, 7-5.

Florian Mayer (31), Germany, def. Philipp Petzschner, Germany, 3-6, 3-6, 6-4, 6-2, 6-4.

Caroline Wozniacki (7), Denmark, lost to Tamira Paszek, Austria, 5-7, 7-6 (4), 6-4.

Sara Errani (10), Italy, def. CoCo Vandeweghe, United States, 6-1, 6-3.

Dominika Cibulkova (13), Slovakia, lost to Klara Zakopalova, Czech Republic, 6-4, 6-1.

Ana Ivanovic (14), Serbia, def. Maria Jose Martinez Sanchez, Spain, 6-3, 3-6, 6-3.

Julia Goerges (22), Germany, def. Shahar Peer, Israel, 6-2, 6-2.

Agnieszka Radwanska (3), Poland, def. Elena Vesnina, Russia, 6-2, 6-1.

Sam Stosur (5), Australia, lost to Arantxa Rus, Netherlands, 6-2, 0-6, 6-4.

Li Na (11), China, lost to Sorana Cirstea, Romania, 6-3, 6-4.

Vera Zvonareva (12), Russia, def. Silvia Soler-Espinosa, Spain, 6-1, 3-6, 6-1.

Sabine Lisicki (15), Germany, def. Bojana Jovanovski, Serbia, 3-6, 6-2, 8-6.

Maria Kirilenko (17), Russia, def. Lourdes Dominguez Lino, Spain, 6-1, 6-2.

Petra Cetkovska (23), Czech Republic, lost to Sloane Stephens, United States, 7-6 (6), 4-6, 6-3.

Peng Shuai (30), China, def. Ayumi Morita, Japan, 7-6 (4), 6-3.