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PARIS, FRANCE - NOVEMBER 04: Marin Cilic of Croatia plays a forehand against Novak Djokovic of Serbia during the Mens Singles quarter final on day five of the BNP Paribas Masters at Palais Omnisports de Bercy on November 4, 2016 in Paris, France. (Photo by Dan Mullan/Getty Images)

PARIS, FRANCE - NOVEMBER 04:  Marin Cilic of Croatia plays a forehand against Novak Djokovic of Serbia during the Mens Singles quarter final on day five of the BNP Paribas Masters at Palais Omnisports de Bercy on November 4, 2016 in Paris, France. (Photo by Dan Mullan/Getty Images)