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Germany's Alexander Zverev hits a return during the men's singles third round match against Chung Hyeon of South Korea at Australian Open 2018 in Melbourne, Australia, Jan. 20, 2018. Alexander Zverev lost 2-3. (Xinhua/Li Peng)
Germany's Alexander Zverev hits a return during the men's singles third round match against Chung Hyeon of South Korea at Australian Open 2018 in Melbourne, Australia, Jan. 20, 2018. Alexander Zverev lost 2-3. (Xinhua/Li Peng)