I agree with Mad, Andy certainly needs his service working well against an on-form Fed.

There was a combination there of Andy's serve % never being that high and seeming to lose penetration after the first set.   However, even in the first set there was much more general pressure on Andy's service games. Ended up with 101 points on Andy's service games and just 67 ponts on Roger's ( for just one game more ) and there was already a marked divergence after the first set which Andy won.  Pressure like that can really build and ultimately, as in this case, the wheels can finally come of fa bit.

I know I have often in the past been one to resist that Andy needs to really change his strategy.  But there are times I really do notice that he works a position and then gets a shot particularly on his forehand side that it is quite clear that if he was prepared to really ping it ( and it went in of course ) the point would be his, but he safety first often gives players another shot.  There was a particular instance of this in the very first rally of the match, good rally as it was.

I think it is clear that Andy is such a good defensive scrambling player that if he ever really got as good an attacking set-up as one or two players then that defensive ability is what could separate them rather than as it does now often compensate him. The other potential problem is of course that it can be so draining, fit even as he is now is, chasing down balls from such as Federer all the time.

I do occasionally wonder if Andy looks too much to use his defensive abilities rather than accept that he has those great gifts to help him out when in trouble but should otherwise try and impose himself more in rallies.

Anyway just some general thoughts that I have been thinking more these last few months, but not so easily applied in ATP finals against Roger in top form.  I think it has been mentioned by some before though that maybe he could almost experiment with a more a attacking strategy in some other lesser tournaments.

Maybe Andy's general strategy and offensive / defensive mix is ultimately what is and will continue to be best for him, but I do hope he never is left in future years wondering what if....

Slightly worrying that Andy was flexing his leg so much near the end, hopefully nothing too serious.

Anyway, now beat Verdasco in straight sets and he's in the semis, lose to Verdasco in straight sets and he's out.  Go to 3 sets and he could be through or out, whether he wins or loses, depending on the other result and indeed possibly on the game difference in the Verdasco match.