
Jelena Jankovic of Serbia reacts during the second round match againt Angelique Kerber of Germany at 2015 WTA Wuhan Open Tennis Tournament in Wuhan, capital of central China's Hubei Province, on Sept. 29, 2015. Jankovic lost 1-2. (Xinhua/Xiao Yijiu)

Jelena Jankovic of Serbia reacts during the second round match againt Angelique Kerber of Germany at 2015 WTA Wuhan Open Tennis Tournament in Wuhan, capital of central China's Hubei Province, on Sept. 29, 2015. Jankovic lost 1-2. (Xinhua/Xiao Yijiu)