WTA Wuhan Open women's singles semifinal: Alison Riske vs. Petra Kvitova

Alison Riske of the United States serves during the women's singles semifinal between Alison Riske of the United States and Petra Kvitova of the Czech Republic at the 2019 WTA Wuhan Open tennis tournament in Wuhan of central China's Hubei Province, on Sept.27, 2019. (Xinhua/Xiong Qi)