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