Carolina Wozniacki of Denmark returns to Jie Zheng of China during the third day of Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Wednesday, Feb. 20, 2013. (AP Photo/Regi Varghese)

Associated Press
Carolina Wozniacki of Denmark returns to Jie Zheng of China during the third day of Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Wednesday, Feb. 20, 2013. (AP Photo/Regi Varghese)
Carolina Wozniacki of Denmark returns to Jie Zheng of China during the third day of Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Wednesday, Feb. 20, 2013. (AP Photo/Regi Varghese)
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