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DUBAI, UNITED ARAB EMIRATES - FEBRUARY 18: Andrea Petkovic of Germany plays a forehand in her match against Caroline Garcia of France during day four of the WTA Dubai Duty Free Tennis Championship at the Dubai Duty Free Stadium on February 18, 2016 in Dubai, United Arab Emirates. (Photo by Francois Nel/Getty Images)

DUBAI, UNITED ARAB EMIRATES - FEBRUARY 18:  Andrea Petkovic of Germany plays a forehand in her match against Caroline Garcia of France during day four of the WTA Dubai Duty Free Tennis Championship at the Dubai Duty Free Stadium on February 18, 2016 in Dubai, United Arab Emirates.  (Photo by Francois Nel/Getty Images)