Rafael Nadal of Spain falls over during his men's singles final match against Novak Djokovic of Serbia on Day Fifteen of the 2013 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2013 in the Flushing neighborhood of the Queens borough of New York City. Nadal defeat Djokovic 6-2, 3-6, 6-4, 6-1, earning his 13th Grand Slam singles title.