Ariel Hsing, San Jose, Calif., def. Yadira Silva, Mexico, 11-9, 11-8, 11-3, 11-5.
John Isner (10), Tampa, Fla., def. Olivier Rochus, Belgium, 7-6 (1), 6-4.
Santiago Giraldo, Colombia, def. Ryan Harrison, Bradenton, Fla., 7-5, 6-3.
Marcelo Melo and Bruno Soares, Brazil, def. John Isner, Tampa, Fla. and Andy Roddick, Austin, Texas, 6-2, 6-4.