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Wozniacki ousts Sharapova at US OpenSeptember 7, 2010 11:12:00Caroline Wozniacki has lived up to her top-seed status at the US Open by overpowering former champion Maria Sharapova in a fourth-round blockbuster.Billed as the Battle of the Blondes, the 20-year-old Dane won through 6-3 6-4, but not before a fired-up Sharapova had brought out the best in her.Wozniacki next plays the unseeded Dominika Cibulkova for a place in the semi-finals as she bids to go one better than last year, when she lost in the final to Kim Clijsters.Cibulkova topped 2004 US Open winner Svetlana Kuznetsova of Russia 7-5, 7-6 (7-4) to reach a grand slam quarter-final for the second time in her career.Also through was Estonian 31st seed Kaia Kanepi, who bounced back from being blitzed in the first set to defeat Belgium's Yanina Wickmayer 0-6, 7-6 (7-2), 6-1.She will next go up against Wimbledon runner-up Vera Zvonareva of Russia, who coasted past unseeded Andrea Petkovic of Germany 6-1 6-2.The Wozniacki-Sharapova match had been expected to come down to the Russian's explosiveness against the Dane's dogged consistency and so it turned out to be.Sharapova, back to near her best after a long battle against injury, had 32 winners to 16 for Wozniacki, but had 36 unforced errors against 10 for her opponent.But more tellingly, Sharapova's serve let her down at key points in both sets, handing breaks to Wozniacki that she was able to capitalise on.