US Open men's singles tennis champion Stan Wawrinka takes a selfie picture as he poses at the "Top of the Rock," in New York's Rockefeller Center, Sept 12, 2016. Wawrinka wore down Novak Djokovic and beat the defending champion 6-7 (1), 6-4, 7-5, 6-3 on Sunday for his first US Open title and third Grand Slam trophy overall. [Photo/IC]