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Switzerland's Roger Federer celebrates after winning the men's singles final match against Croatia's Marin Cilic at Australian Open 2018 in Melbourne, Australia, Jan. 28, 2018. (Xinhua/Bai Xuefei)
Switzerland's Roger Federer celebrates after winning the men's singles final match against Croatia's Marin Cilic at Australian Open 2018 in Melbourne, Australia, Jan. 28, 2018. (Xinhua/Bai Xuefei)