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STUTTGART, GERMANY - APRIL 26: Maria Sharapova of Russia celebrates winning match point against Roberta Vinci of Italy during the Porsche Tennis Grand Prix at Porsche Arena on April 26, 2017 in Stuttgart, Germany. (Photo by Adam Pretty/Bongarts/Getty Images)

STUTTGART, GERMANY - APRIL 26:  Maria Sharapova of Russia celebrates winning match point against Roberta Vinci of Italy during the Porsche Tennis Grand Prix at Porsche Arena on April 26, 2017 in Stuttgart, Germany.  (Photo by Adam Pretty/Bongarts/Getty Images)