Petra Kvitova (L) of the Czech Republic shakes hands with Polona Hercog of Slovenia after the women's singles second round match between Petra Kvitova of the Czech Republic and Polona Hercog of Slovenia at the 2019 WTA Wuhan Open tennis tournament in Wuhan of central China's Hubei Province, Sept. 23, 2019. (Xinhua/Cheng Min)