Stan Wawrinka of Switzerland reacts during a men's singles third round match against Daniel Evans of Britain at the 2016 U.S. Open tennis tournament in New York, the United States, Sept. 3, 2016. Wawrinka won 3-2. (Xinhua/Bao Dandan)
Stan Wawrinka of Switzerland reacts during a men's singles third round match against Daniel Evans of Britain at the 2016 U.S. Open tennis tournament in New York, the United States, Sept. 3, 2016. Wawrinka won 3-2. (Xinhua/Bao Dandan)