Originally Posted by Tennis Fool
But it seemed that the change in pace rattled Fed enough that he began to question his own game, and when he begins to question, that's when the backhand goes off, that's when he fails to move in on Agassi's second serve, playing defensively.
It's possible although I dont think that affected him as much as the crowd and his inability to take the big points right from when he served for the first set. He needed eight set points. It's not as if Agassi played outstanding on those set points. Agassi got some lucky net cords, Federer made some forehand and backhand errors, Agassi hits a return winner, etc.
From there you could see Federer just like questioning himself especially after getting into almost every service game Agassi had in the second, and he finds himself down a break.