SAINT-PETERSBURG, RUSSIA - SEPTEMBER 25: Stan Wawrinka of Switzerland in action against Alexander Zverev (not seen ) of Germany during the final game of Men's singles of Saint-Petersburg Open 2016 International Tennis Tournament at the SIBUR Arena in Saint-Petersburg , Russia on September 25, 2016. (Photo by Mihailicenko Sergey/Anadolu Agency/Getty Images)
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