Latvian Sevastova stuns defending champ Stephens in U.S. Open quarters

Sloane Stephens of the United States celebrates during the women's singles quarterfinal match against Anastasija Sevastova of Latvia at the 2018 US Open tennis championships in New York, the United States, Sept. 4, 2018. Sevastova won 2-0. (Xinhua/Wang Ying)