Paris - Roger Federer can't help but back himself to lift a sixth Wimbledon title after achieving history with his first French Open crown.

The Swiss told reporters on Monday that he's ready to take back his grass-court title from Rafael Nadal.

"I think I'm favourite at Wimbledon with the success that I've had," said the 14-time Grand Slam champion, level alongside Pete Sampras as the man with the most majors in his resume.

"There are a lot of tough players out there, Andy Murray's best surface might be grass, and I think he's playing excellent. From Rafa (Nadal) we can only expect good tennis anyway.

"There a lots of dangerous players, but I have the game and the experience to win at Wimbledon many more times, I'd like to get this one this year."

Federer admitted that has yet to decide if he will travel to Halle, Germany, this week to defend his grass title.

"I feel fine but I'm mentally drained and exhausted. It's hard right now to do anything, but I'm happy Paris is over, it was a long, hard three weeks."

The Swiss, who celebrated well into the wee hours of Monday with a modest amount of champagne and up to 60 friends from Switzerland, said that once he arrived for the Wimbledon fortnight (starting June 22), "you start to get into a different frame of mind. I love going there and it only takes me a few hours to feel at home."

Federer said that persistent reports that Nadal might have to miss Wimbledon due to chronic right knee pain were "frightening."

"Rafa's not been injured that much, it's not like he played only 40 matches last season. He was there for the big occasions. It happens that you go through injury stretches.

"It doesn't seem 100 percent serious (the possible pullout), but I only wish him the best. He wasn't taping his knees in Paris, he seemed fine to me and I can tell when he is in pain and when he's not.

"It's frightening that he might pull from Wimbledon, you only want the best to play the biggest events."

Nadal has withdrawn from this week's Queens' Club event in London over the knee problems and his Wimbledon participation is unsure as well. (dpa)