US Open women's singles 2nd round: Petra Kvitova beats Wang Yafan 2-0

Petra Kvitova of the Czech Republic hits a return during the women's singles second round match against Wang Yafan of China at the 2018 US Open tennis Championships in New York, the United States, Aug. 30, 2018. Petra Kvitova won 2-0. (Xinhua/Wang Ying)?