NEW YORK, NY - SEPTEMBER 08: (L-R) Rafael Nadal of Spain shakes hands with Juan Martin del Potro of Argentina after their Men's Singles Semifinal match on Day Twelve of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 8, 2017 in the Flushing neighborhood of the Queens borough of New York City. Rafael Nadal defeated Juan Martin del Potro in the fourth set with a score of 4-6, 6-0, 6-3, 6-2. (Photo by Elsa/Getty Images)
