Rodger Federer hopes to be challenging for Grand Slam titles once again this year after returning from a serious knee injury.
The Swiss star was forced to take a six-month break from the game and has not played a singles tournament since Wimbledon last summer.
Federer returned to action and tested his knee at the Hopman Cup in Perth last week and says he is surprised at how good he feels.
The former world number one is in the final stages of his preparation for the Australian Open, but he is well down the seeds at 17th, and this Grand Slam looks to have come too soon with regards to winning it.
However Federer is taking a big picture view to his return and hopes to be challenging for major honours again later this year.
"I would hope so," he said. "First I need five or six good tournaments to get an opinion of how strong I'm going to be, but looking how I played last week I'm quite surprised how well I'm already playing.
"I'm keeping expectations low just because of the very little I've played. Playing matches is a completely different animal to practising, [but] I hope after the first three months I'll have a great opportunity to prepare for Wimbledon and the US Open."