NEW YORK, NY - AUGUST 29: Roger Federer attends Arthur Ashe Kids Day 2015 at the US Open at USTA Billie Jean King National Tennis Center on August 29, 2015 in New York City. (Photo by Uri Schanker/FilmMagic)
NEW YORK, NY - AUGUST 29: Roger Federer attends Arthur Ashe Kids Day 2015 at the US Open at USTA Billie Jean King National Tennis Center on August 29, 2015 in New York City. (Photo by Uri Schanker/FilmMagic)