Roger Federer booked his place in the Australian Open final but is carry a leg injury
Roger Federer sacrificed a two-set lead to Stan Wawrinka in Thursday's first semi-final as his fellow Swiss forced a tense deciding set.
Federer was forced to take an off-court medical timeout before the start of the fifth set but returned to seal a place in his 28th Grand Slam final.
"The leg wasn't better or worse in the fifth," said Federer.
Roger Federer went two sets up before Stan Wawrinka mounted a comeback
"I felt tightness throughout the match, and I felt like it slowed me down.
"I just hoped that maybe having the physio work on it, that it would make me feel better.
"But it didn't. It's not something I'm necessarily really worried about in any way.
Stan Wawrinka also took a medical timeout after battling a knee injury
"So that's a good thing."
Asked whether he felt the problem would affect him in the final, Federer added: "I mean, no.
"If I had to say anything right now, no."
Federer's opponent will be decided this morning when Rafael Nadal and Grigor Dimitrov meet in the second semi-final.
Should the Spaniard triumph, it would set up a 35th meeting of the two great rivals.
"I just think [Rafa] is an incredible tennis player," said Federer.
"He's got shots that no other one has.
"When you have that, you are unique and special.
"Plus he's got the grit.
"He's got the mental and physical ability to sustain a super high level of play for years and for hours and for weeks.
"He's proven that time and time again."