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Spanish tennis player Rafael Nadal (R) and Austrian tennis player Dominic Thiem pose with their trophies at the end of their ATP Madrid Open final match in Madrid, on May 14, 2017. Nadal won 7-6 and 6-4. (Photo by Oscar Gonzalez/NurPhoto via Getty Images)

Spanish tennis player Rafael Nadal (R) and Austrian tennis player Dominic Thiem pose with their trophies at the end of their ATP Madrid Open final match in Madrid, on May 14, 2017. Nadal won 7-6 and 6-4. (Photo by Oscar Gonzalez/NurPhoto via Getty Images)