2019 US Open Tennis Tournament- Day Nine. Stan Wawrinka of Switzerland in action against Danill Medvedev of Russia in the Men's Singles Quarter-Finals match on Arthur Ashe Stadium during the 2019 US Open Tennis Tournament at the USTA Billie Jean King National Tennis Center on September 3rd, 2019 in Flushing, Queens, New York City. (Photo by Tim Clayton/Corbis via Getty Images)
