Agnieszka Radwanska of Poland returns the ball to Flavia Pennetta of Italy during the third day of Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Wednesday, Feb. 19, 2014. (AP Photo/Kamran Jebreili)

Mideast Emirates Dubai Tennis Championships

Agnieszka Radwanska of Poland returns the ball to Flavia Pennetta of Italy during the third day of Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Wednesday, Feb. 19, 2014. (AP Photo/Kamran Jebreili)

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