Dominika Cibulkova knocked off No. 11 Svetlana Kuznetsova, 7-5, 7-6 (4), in the fourth round of the 2010 U.S. Open Monday morning. Kuznetsova struggled throughout, making 42 unforced errors. She fought back to force a second-set tiebreaker, but Cibulkova didn't back down.
In the quarters, Cibulkova will face the winner of the Maria Sharapova/Caroline Wozniacki match.