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September 08 2014: Marin Cilic of Croatia posing with trophy after defeating Kei Nishikori of Japan and winning the Men's Singles Championship title at the US Open, Billie Jean King National Tennis Center, Flushing Meadow, NY. (Photo by Cynthia Lum/Icon Sportswire/Corbis/Icon Sportswire via Getty Images)

September 08 2014: Marin Cilic of Croatia posing with trophy after defeating Kei Nishikori of Japan and winning the Men's Singles Championship title at the US Open, Billie Jean King National Tennis Center, Flushing Meadow, NY. (Photo by Cynthia Lum/Icon Sportswire/Corbis/Icon Sportswire via Getty Images)