"Last year I was scared of a first-round exit, not being able to last five sets. This year will be a different situation, I feel way better," said the Swiss, who is aiming to equal Pete Sampras's record of 14 Grand Slam titles.

"[I have] more confidence and am mentally tougher."

A year after a mystery virus set off a chain of events which toppled Federer from his pedestal, the world number two will return to Melbourne Park on Monday determined to win a fourth title.

Photographs and Text: Reuters