Maria Sharapova of Russia takes a training session ahead of 2019 Australian Open at Melbourne Park in Melbourne, Australia, on Jan. 7, 2019. Australian Open Tennis Tournament will take place from Jan. 14 to 27. (Xinhua/Bai Xue) 00????

Elina Svitolina (C) of Ukraine interacts with Australian Open ballkids at Melbourne Park in Melbourne, Australia, on Jan. 7, 2019. Australian Open Tennis Tournament will take place from Jan. 14 to 27. (Xinhua/Bai Xue)