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STUTTGART, GERMANY - APRIL 29: Maria Sharapova of Russia plays a forehand during her match against Kristina Mladenovic of France during the Porsche Tennis Grand Prix at Porsche Arena on April 29, 2017 in Stuttgart, Germany. (Photo by Adam Pretty/Bongarts/Getty Images)

STUTTGART, GERMANY - APRIL 29:  Maria Sharapova of Russia plays a forehand during her match against Kristina Mladenovic of France during the Porsche Tennis Grand Prix at Porsche Arena on April 29, 2017 in Stuttgart, Germany.  (Photo by Adam Pretty/Bongarts/Getty Images)