Stan Wawrinka of Switzerland returns the ball against Kei Nishikori of Japan during their semifinal match of men's singles at the 2016 Rogers Cup in Toronto, Canada, July 30, 2016. Stan Wawrinka lost 0-2. (Xinhua/Zou Zheng)
Stan Wawrinka of Switzerland returns the ball against Kei Nishikori of Japan during their semifinal match of men's singles at the 2016 Rogers Cup in Toronto, Canada, July 30, 2016. Stan Wawrinka lost 0-2. (Xinhua/Zou Zheng)