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Novak Djokovic (L) of Serbia greets Nishioka Yoshihito of Japan after their men's singles third round match at the 2020 Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2020. (Xinhua/Zhu Wei)
Novak Djokovic (L) of Serbia greets Nishioka Yoshihito of Japan after their men's singles third round match at the 2020 Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2020. (Xinhua/Zhu Wei)