Angelique Kerber of Germany attends a training session ahead of Australian Open 2017 at Melbourne Park in Melbourne, Australia, Jan. 12, 2017. Australian Open 2017 will take place at Melbourne Park from Jan. 16 to Jan. 29. (Xinhua/Bai Xue)
Angelique Kerber of Germany attends a training session ahead of Australian Open 2017 at Melbourne Park in Melbourne, Australia, Jan. 12, 2017. Australian Open 2017 will take place at Melbourne Park from Jan. 16 to Jan. 29. (Xinhua/Bai Xue)