China's Peng wins 4th round at U.S. Open
Peng Shuai of China returns a shot during the women's singles fourth round match against Lucie Safarova of the Czech Republic at the 2014 U.S. Open in New York, the United States, Aug. 31, 2014. Peng Shuai won 2-0.(Xinhua/Yin Bogu)