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Novak Djokovic of Serbia returns a shot during the men's singles second round match against Ito Tatsuma of Japan at the 2020 Australian Open tennis tournament in Melbourne, Australia, Jan. 22, 2020. (Xinhua/Zhu Wei)
Novak Djokovic of Serbia returns a shot during the men's singles second round match against Ito Tatsuma of Japan at the 2020 Australian Open tennis tournament in Melbourne, Australia, Jan. 22, 2020. (Xinhua/Zhu Wei)