Roger Federer captures sixth Australian Open, Roger Federer defeated Marin Cilic in five sets to capture his sixth Australian Open championship and his 20th career Grand Slam title.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceRoger Federer defeated Marin Cilic in five sets to capture his sixth Australian Open championship and his 20th career Grand Slam title.Add us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished Jan 28, 2018 | Modified Jan 28, 2018SI STAFFShare on FacebookShare on XHome/Tennis