Roger Federer has won his sixth Australian Open today by beating Marin Cilic in a five set thriller under the roof in Melbourne. Federer won 6-2 6-7 6-3 3-6 6-1 to claim his 20th Grand Slam title and becomes the fourth player in history to win 20 or more major single titles along side Margaret Court, Serena Williams & Steffi Graf. Federer now 36 years of age, great form continues and has won three of the last five majors.