I knew threads like this would be started after this morning's match. Federer competed very well this morning, and could have won the match with the flip of a coin. The fact that he came back to win that 4th set shows a lot by itself. I agree that his chances of winning another major other than Wimbledon are not great, but if he can still make the semis of them and get to the finals or win Wimbledon, there's no reason he can't play 3-4 more years. The only question is if he wants to.
Wilson Blade 98S with Wilson Ripspin 17 @55