NEW YORK, NY - AUGUST 27: Rafael Nadal of Spain practices during Arthur Ashe Kids' Day prior to the start of the 2016 US Open at USTA Billie Jean King National Tennis Center on August 27, 2016 in New York City. (Photo by Steven Ryan/Getty Images)
NEW YORK, NY - AUGUST 27: Rafael Nadal of Spain practices during Arthur Ashe Kids' Day prior to the start of the 2016 US Open at USTA Billie Jean King National Tennis Center on August 27, 2016 in New York City. (Photo by Steven Ryan/Getty Images)
