Serena Williams beats Karolina Pliskova at US Open women's quarterfinal match

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