Originally Posted by duong
Still a great level of play (87% of service games won like in 2008, 37% of return games won, which would have been considered as huge in any era if there had not been last year) but fragile in pressure moments : big matches and French Open where he had the highest stakes.
Yes this is the big difference. And also just luck. It went his way last year in close matches; this year not so much, apart from the A.O.