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Novak Djokovic (R C) of Serbia and Rafael Nadal of Spain compete during the men's singles final match at 2019 Australian Open in Melbourne, Australia, Jan. 27, 2019. (Xinhua/Bai Xuefei)
Novak Djokovic (R C) of Serbia and Rafael Nadal of Spain compete during the men's singles final match at 2019 Australian Open in Melbourne, Australia, Jan. 27, 2019. (Xinhua/Bai Xuefei)