Xu Yifan of China hits a return to Liu Fangzhou of China during the third round match of the women's singles at the 2013 ITF Women's Circuit in Huzhu, northwest China's Qinghai Province, June 28, 2013. Xu Yifan won 2-1. (Xinhua/Wang Bo)

Xu Yifan of China hits a return to Liu Fangzhou of China during the third round match of the women's singles at the 2013 ITF Women's Circuit in Huzhu, northwest China's Qinghai Province, June 28, 2013. Xu Yifan won 2-1. (Xinhua/Wang Bo)