I don't see a lack of interest or motivation, especially with the big goal this year he expects or hopes to achieve.
I think, with all the records, Grand Slam, GOAT talk from the media, he is a little bit carried away and gets a bit self-conceited. Many of us are. It's actually natural to think that way--like he said, he expected to win tonight (against Canas in Miami). When you have won too much, and too much praise poured on you, every human being will get a bit of the feeling of "flying in the sky" and forget he is still standing on the ground or should be. And you even can't blame it. I think his showing of lack of patience in the second loss is an evidence to this. All the off-court commercial or personal stuff is another evidence.
Besides the obvious match-up thing and other technical things (which I'm not an expert in), we can see that he still plays great tennis. For some parts of the last match, I think he was playing even better than AO semi, which is very impressive. I bet at the beginning of the 3rd set, nobody would expect him to lose it in the end. He totally outplayed Canas with his brilliant and beautiful game.
The two consecutive losses, in my eyes, shouldn't be a signal of his going-down ever since. NO WAY. They should act as a wake-up call to him and all of us that he is only human, he can lose any time, he should still work very hard to earn the win and don't take everything for granted.
Roger is a very wise person, not only in tennis but in the way he looks at things. He has a very clear mind to figure out problems and get them right again. Remember after 05AO, which in my eyes is and will always be the biggest loss in his career, and he bounced back with winning four titles in a row. We have no reason to think he will go down all the way from now, though if his game is good enough to beat Nadal on clay and then to claim RG is another issue here.
This is what Murray said when asked to comment on his loss:
Q. What is the general feeling in the locker room with Federer losing the second successful time in the Masters Series? Is there a general feeling that maybe his aura of invincibility is fading away a little bit?
ANDY MURRAY: I've never said that he was invincible. It is possible to beat him, you just have to hope that he doesn't play his best, and you play a really good match. I haven't spoken to too many of the players about it, but it probably does give you a feeling that you will have a chance at winning against him.
But he's been on such a great run that there's going to come a time when he didn't play his best two tournaments in a row, and I'm sure he'll be fired up for the clay court season now and go work hard on his game and be back better than ever.
I think Murray hit the point.