Anderson fired eight aces in a 6-3, 6-3 win over qualifier Pablo Carreno-Busta of Spain to set up a quarterfinal match against eighth-seeded Slovenian Grega Zemlja, who advanced with a 7-6 (7-5), 6-1 victory over Swiss qualifier Henri Laaksonen.
Klizan beat Italian qualifier Filippo Volandri 6-4, 7-6 (7-5) and will face seventh-seeded Dutchman Robin Haase in the quarterfinals. Haase beat Kenny De Schepper of France 6-2, 6-7 (2-7), 6-3.
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