He's also coming into Sunday's match with a huge amount of confidence after ending his four and a half year Grand Slam title drought on the same court at Melbourne Park last year - a victory that set in motion his best season since 2009 with a record eighth title at Wimbledon and a No 2 ranking to finish the year.
Federer, the 19-time Grand Slam champion and one of the greatest tennis players of all time, once held the world's top spot continuously for a record 237 weeks, becoming the highest-paid tennis player with earnings of about US$118 billion.
Federer is a big-time favorite to win it all.
Federer had been nearly flawless, toying with his inexperienced opponent and putting on a clinic which ended in anticlimactic fashion after only 62 minutes.
Bespectacled like Clark Kent but playing like Superman, world No. 58 Chung became the lowest-ranked semi-finalist at Melbourne Park since Marat Safin in 2004.
"I hardly know Chung". Or will Federer continue his ruthless streak to set up a Wimbledon final rematch against Marin Cilic?
Federer was sympathetic. "I've played with blisters in the past a lot, and it hurts a lot, and at one point it is just too much and you can't take it anymore", he said."That's when you realise there is no way you can come back and you make things really worse, it is better to stop". "I think I can play better next time".
"I can't believe how fast now the week has turned out to be".
Those are two major aspects to the game.
"So I just tried to hang around and be a bit more aggressive".
Federer's third-round demolition of Berdych past year on the comeback from injury proved to be a defining moment on his way towards an odds-defying fifth Australian Open triumph.
For his opponent Tomas Berdych, who led 3-0 and 5-2 in the first set, this was his opportunity, a chance to end an eight-match losing streak against the man who had knocked him out of the last two Australian Opens.
"To bounce back from a Novak match and just somehow get it done today, this afternoon, that's tough".
"To close it out, that was mighty impressive and shows that Chung's had good composure, a great mindset". It was his third-round win over the Czech here a year ago that gave him, for the first time, the belief that he may be able to go all the way after returning to the court for the first time in six months. I was like, "Sure, let me know if you want to hit". I think the belief and the way he played very positive made him win that match because he didn't look good there for a while when he was down a set and a break and everything.
"He just loves the environment", said Chung's coach Neville Godwin.