Philipp Kohlschreiber (L) of Germany and Roger Federer of Switzerland meet at the net at the conclusion of their third round match which Federer won in three sets at the US Open Tennis Championships at the USTA Billie Jean King National Tennis Center in New York City on September 5, 2015. Federer won 6-3, 6-4, 6-4. Photo by Monika Graff/UPI