NEW YORK, NY - AUGUST 27: Tennis player Juan Martin del Potro plays during the Authur Ashe Kids' Day at USTA Billie Jean King National Tennis Center on August 27, 2016 in New York City. (Photo by John Lamparski/Getty Images)
NEW YORK, NY - AUGUST 27: Tennis player Juan Martin del Potro plays during the Authur Ashe Kids' Day at USTA Billie Jean King National Tennis Center on August 27, 2016 in New York City. (Photo by John Lamparski/Getty Images)