I'm not sure what's declined the most - Fed's shot-making or his mental state.
On second thoughts I think it's his mental state.
Under any sort of sustained pressure from class opponents he falls apart.
Djokovic this week, Murray last week, Nadal at the Aust Open.
Since when does he throw a racquet?
He may win one more Slam but I'd be prepared to bet against it.
If he runs up against Murray or Nadal in particular in any GS final I'd put his chances of success at about 20 per cent.
Looks like Djokovic (who's hardly been in sparkling form himself) can now be added to the list.
He was a great player and for a set or so he can still produce some marvellous stuff but when the pressure comes on he's folding (the Roddick match aside - although he was a little lucky in that one too).
And one other thing - when a particular shot isn't working for him e.g the forehand down the line, he refuses to put it away and play the percentages.
It smacks of either arrogance i.e "I am Roger Federer and I've always played this way" or lack of judgment under pressure, or both.
Boy does he need a coach!