Roger Federer will face Marin Cilic in the final of the Australian Open after defeating South Korea’s Hyeon Chung in the semi-finals. Sadly, Chung was forced to retire in the second set due to painful blisters on his feet. Federer had convincingly won the first set 6-1 and was on his way to the second when Chung retired at 5-2. Federer will be playing in his 30th grand slam final on Sunday