Croatia's Petra Martic returns the ball during a match against Venus Williams of U.S during the first day of the WTA Qatar Ladies Open in Doha, Qatar, Monday, Feb. 10, 2014. (AP Photo/Osama Faisal)
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Croatia's Petra Martic returns the ball during a match against Venus Williams of U.S during the first day of the WTA Qatar Ladies Open in Doha, Qatar, Monday, Feb. 10, 2014. (AP Photo/Osama Faisal)
