CoCo Vandeweghe from the U.S. returns the ball to Elina Svitolina of Ukraine during the quarter finals of the Dubai Tennis Championships in Dubai, United Arab Emirates, Thursday, Feb. 18, 2016. (AP
Elinaa Svitolina from Ukraine returns the ball to Garbine Muguruza from Spain during the third day of the Dubai Tennis Championships in Dubai, United Arab Emirates, Wednesday, Feb. 17, 2016. (AP Photo/Kamran
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