Originally Posted by ninman
Given that he's world number 2, was number 1 for a few months this year, won 3 masters series titles, Wimbledon, and had very consistent results all year, I'd say that retirement is the last thing on his mind.
He could easily have won the match today if he'd served better at the crucial moments. I expect he'll be disappointed and angry with himself for not winning the match.
Don't expect Federer to go anywhere for a good while yet.
Perhaps the reason why retirement is the last thing on his mind is because there are serious problems with his brain.