Zheng Saisai of China hits the ball during the women's singles first round match against Danka Kovinic of Montenegro at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 17, 2017. Zheng lost 0-2. (Xinhua/Bai Xue)
Zheng Saisai of China hits the ball during the women's singles first round match against Danka Kovinic of Montenegro at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 17, 2017. Zheng lost 0-2. (Xinhua/Bai Xue)