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![(SP)AUSTRALIA-MELBOURNE-TENNIS-AUSTRALIAN OPEN-FINAL](136931732_15171830555111n.jpg)
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)