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Chung Hyeon of South Korea reacts during the men's singles fourth round match against Novak Djokovic of Serbia at Australian Open 2018 in Melbourne, Australia, Jan. 22, 2018. Chung Hyeon won by 3-0. (Xinhua/Zhu Hongye)
Chung Hyeon of South Korea reacts during the men's singles fourth round match against Novak Djokovic of Serbia at Australian Open 2018 in Melbourne, Australia, Jan. 22, 2018. Chung Hyeon won by 3-0. (Xinhua/Zhu Hongye)