Philipp Kohlschreiber of Germany at the US Open in New York

Philipp Kohlschreiber of Germany returns the ball Alexander Zverev, also of Germany, in the first set of their third round match in Arthur Ashe Stadium at the 2018 US Open Tennis Championships at the USTA Billie Jean King National Tennis Center in New York City on September 1, 2018. Photo by Monika Graff/UPI