He may be on a 29-match winning streak on grass and favourite to win a third successive Wimbledon title but Roger Federer says he will be feeling the pressure when he steps on Centre Court today.
"I think there will be relief once the first match is played," said Federer before his opening match with France's Paul-Henri Mathieu.
"There will be tension all the way through the match, I think that's normal.
"I should have lost last week in the first round but came through and won.
"It's always very tough on grass because it's always only a matter of a few points.
"That's the difference in the last 29 matches.
"Hopefully I can keep the streak alive, especially in the early rounds when I'm always going to be the heavy favourite."
That streak includes two Wimbledon titles and three victories in the prechampionship warm-up tournament in Halle.
Federer is aiming to become only the third person in the Open era since Britain's Fred Perry in 1936 to win a hat-trick of titles.
Pete Sampras and Bjorn Borg are the only others to achieve such a feat.
Federer said: "Already to win two is fantastic because you really prove the first time it wasn't just a fluke.
"Now I'm at a level where two or three almost doesn't play a big role but it would definitely show how much better I can be to actually win three in a row.
"That would be something really fantastic at my favourite event. I'll be really focused walking those first few steps on Centre Court but I'll definitely take a look around and say 'wow, this is where I've lived some great moments already.'
I haven't hit a ball here since match point last year so it's definitely going to be special."
Last year's final could have seen a different outcome, however, if not for the rain which intervened with Andy Roddick a break up in the third set after the first two sets had been shared.
The Swiss star sees the No 2 seed Roddick as the most likely contender among his small group of main rivals again for this year's title.
"Roddick, Hewitt and Henman for me are the main rivals," said the 23-year-old, who has lost only five matches since that win 12 months ago.
"Tim is one of the guys that plays best on grass.
"He's very experienced on the surface and it really needs a very good player to beat him.
"Andy hasn't really been able to be a part of the Masters Series of grand slams in the semi-finals or finals.
"But I feel on grass, as he showed at Queen's, he's ready to do it again. For me he's the biggest threat of all."
Federer was disappointed to lose to eventual winner Rafael Nadal in the semifinals of the French Open --the one grand slam he has yet to win - but revealed he had become much more adept at coping with those rare defeats.
"I remember the wins more, of course," added Federer, who shot to prominence by beating seven- time champion Pete Sampras on Centre Court in 2001, ending his 31-match winning streak at the All England Club.
"I've had ten times more wins than defeats.
"But I think it's important to always show a reaction once you lose.
"That's why I've been able to do very well.
"Every time I lost a match, I immediately got back on a winning streak.
"Same after the French, right away I reacted and won a tournament.
"But I have to say I can cope with losses much easier than I used to. I used to cry very much and be very disappointed once I lost.
"But with all the success I've had over the last few years it's really become no problem for me to handle it and actually understand why I've lost a match, explain it to myself and move on from there."