Marin Cilic of Croatia celebrates defeating Kei Nishikori of Japan in the men's final at the US Open tennis championship in New York, September 8, 2014. (Photo by Gary Hershorn/Corbis via Getty Images)
Marin Cilic of Croatia celebrates defeating Kei Nishikori of Japan in the men's final at the US Open tennis championship in New York, September 8, 2014. (Photo by Gary Hershorn/Corbis via Getty Images)