Roger Federer of Switzerland smiles at a news conference at the Melbourne Park Jan. 13, 2008 ahead of the Australian Open tennis tournament, which begins on Jan. 14, 2008.--Xinhua

Twice Australia Open Champion Roger Federer said on Sunday he was one hundred percent ready for the tournament.

The Swiss, 12-time Grand Slam champion, was unable to enter the Kooyong exhibition tournament due to a stomach illness but he is not worried, saying he was physically fine.

"I've been playing sets the last couple of days, which was very important for me, to be able to play points. I'm happy with my form, to be honest. Physically I'm fine now, too. No more issues," said Federer, who is biding for a third consecutive Australian Open title.

"I practiced very well in Dubai before coming here, so I definitely created a good base for this fortnight. I feel the way I would like to feel. Tennis comes back very quickly. When you practice so hard, like the way I did in Dubai, then you practice for a couple days, you're right away back into things."

Entering the 2008 Australian Open as the top seed, Federer refused to point out the main threats, only said that it was always tough in Australia.

"I always know the difficulties of the first round. They are never easy, no matter how you enter, with full confidence or little. It's always tough in Australia because you don't have many matches coming in."

"But I'm very much used to it, not playing for four weeks or six weeks and then coming in and playing a big tournament. So for me it's not much of a change."

The world No. 1 Federer has made the final of the last 10 Grand Slam tournaments and won eight of them which no men had done that before.

"Obviously I'm surprised, as well, at how consistent I've been at all the majors. It's not just I've played many Grand Slam finals, it's consecutive. And I think that's the great effort."

"There's always a lot of pressure, but somehow I always get through. I got the right approach and I'm confident. I got different styles of play I can use to win matches. Always in the first round, I don't play against a fellow top 10 player, which helps obviously. This is also one of the reasons I always maybe played very well throughout the Grand Slam." added Federer.