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In other women’s second-round action Thursday, 13th-seeded Dominika Cibulkova and No. 14 Maria Kirilenko advanced in straight sets.

Kei Nishikori, seeded 17th on the men’s side, eliminated American Tim Smyczek. No. 11-seeded Nicolas Almagro needed five sets and 3 hours, 19 minutes to defeat Philipp Petzschner.