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

Karolina Pliskova of the Cezch Republic hits a return during the women's quarterfinal match against Serena Williams of the United States at the 2018 US Open tennis tournament in New York, the United States, Sept. 4, 2018. Williams won 2-0. (Xinhua/Li Muzi)?