Defending champion Roger Federer through to Australian Open final

Roger Federer has made it though to the final of the Australian Open after Hyeon Chung was forced to retire in the second set of their semi-final.

The defending champion was on course to move two sets in front when his South Korean opponent called it quits due to a blister on his left foot.

Federer, into a record seventh final Down Under, will now take on Marin Cilic - victorious against Britain's Kyle Edmund in the other semi - on Sunday as he seeks his 20th Grand Slam title.

World number two Federer broke Chung's serve in the first game and opened up a commanding 5-1 lead, before eventually taking his sixth set point to move in front in the match.

Chung was clearly struggling with the injury to his foot, and at 5-2 down in the second set he took the tough decision to withdraw, ending his hopes of prolonging his dream run in the process.