US Open Tennis Championships

Stan Wawrinka of Switzerland reflects as he is about to lose to Roger Federer, also of Switzerland, in the third set of their semi-final match at the US Open Tennis Championships at the USTA Billie Jean King National Tennis Center in New York City on September 11, 2015. Federer won 6-4, 6-3, 6-1. Photo by Monika Graff/UPI