Video PlayerClose

Stefanos Tsitsipas of Greece returns the ball during the men's singles third round match against Milos Raonic of Canada at the 2020 Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2020. (Xinhua/Bai Xue)

Stefanos Tsitsipas of Greece returns the ball during the men's singles third round match against Milos Raonic of Canada at the 2020 Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2020. (Xinhua/Bai Xue)