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2019 Australian Open Champion, Novak Djokovic of Serbia, poses for selfies with his fans at the Royal Botanical Gardens in Melbourne, Australia on Jan. 28, 2019. (Xinhua/Bai Xue)
2019 Australian Open Champion, Novak Djokovic of Serbia, poses for selfies with his fans at the Royal Botanical Gardens in Melbourne, Australia on Jan. 28, 2019. (Xinhua/Bai Xue)