Video PlayerClose
Novak Djokovic of Serbia hits a return during the ATP Cup semifinal match against Daniil Medvedev of Russia in Sydney, Australia, on Jan. 11, 2020. (Xinhua/Zhu Hongye)
Novak Djokovic of Serbia hits a return during the ATP Cup semifinal match against Daniil Medvedev of Russia in Sydney, Australia, on Jan. 11, 2020. (Xinhua/Zhu Hongye)