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

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