Here's what the players had to say . . .
From Federer's post-match interview:
QUESTION: You played a wonderful game tonight and Lleyton said you will get a Grand Slam in future because you have so many features in your technology and you are still young, but he said you should keep your condition more stable because sometimes you play good and sometimes you play bad. So how do you think about that?
ROGER FEDERER: I don't really--not in a bad way, but I don't really care about what he says. Same as other players say about me, what I say about other guys shouldn't really bother the other guys. I know really what I have to do and why I miss shots. I also--and he knows best why he misses his shots, so we have to clean up in our own boat or house or whatever. But I know what I have to work on and, for me, with my game, it just needs more time and to work hard and until my whatever, my mental, my technique, whatever, is right in place and I think one day if I think everything is in place, I will have a chance to win Grand Slams and I think it's just because he's so strong mentally and physically, he can do this much earlier.
and this was what Lleyton actually said after winning that match:
QUESTION: There are a lot of people saying that Roger Federer plays a bit like Pete Sampras. With an all-round game like Roger Federer, compared to the serve-volley game of Pete Sampras, from your experience playing both players, what do you think are the differences between them?
LLEYTON HEWITT: Well, you know, it's hard to compare Pete Sampras with Roger Federer right at the moment. Obviously Roger is a great player and he's only going to get better and better and, you know, I'm convinced that he's going to win a Grand Slam sooner or later. He plays very well on all surfaces. This year he's been probably a little bit up and down. Obviously he played great before the French Open and great around US Open time onwards, but he has a couple of lapses in there now and then where he has three or four bad weeks in a row and I think, you know, as I said, Pete Sampras has won 14 Grand Slams and Pete is not the worst player from the back of the court by no means, especially when he's at his peak. So, you know, at the moment, I still believe that, you know, obviously the way the Sampras played at the US Open was pretty faultless.
Looks like the problem is in the question, really.