Stan Wawrinka plays his quarterfinal match at the French Open

Stan Wawrinka of Switzerland kicks a ball during his French Open men's quarterfinal match against Roger Federer of Switzerland at Roland Garros in Paris on June 4, 2019. Federer defeated Wawrinka 7-6 (4), 4-6, 7-6 (5), 6-4 to advance to the semi-finals. Photo by David Silpa/UPI