Switzerland's Roger Federer (C) waves as he arrives on court to meet Croatia's Marin Cilic in the men's singles final at the Australian Open 2018 in Melbourne, Australia, Jan. 28, 2018. (Xinhua/Li Peng)
Switzerland's Roger Federer competes during the men's singles final match against Croatia's Marin Cilic at Australian Open 2018 in Melbourne, Australia, Jan. 28, 2018. (Xinhua/Li Peng)