
Sam Querrey of the United States hits a return during the men's Singles quarterfinal match against Kevin Anderson of South Africa at the 2017 U.S. Open in New York, the United States, Sept. 5, 2017. Kevin Anderson won 3-1. (Xinhua/Li Muzi)

Sam Querrey of the United States hits a return during the men's Singles quarterfinal match against Kevin Anderson of South Africa at the 2017 U.S. Open in New York, the United States, Sept. 5, 2017. Kevin Anderson won 3-1. (Xinhua/Li Muzi)