The American Giant played really well not only on his service games, but also during the rallies from the baseline. Eventually John won 7-6 (3) 3-6 7-6 (5) in 2 hours and 16 minutes. Match Stats
Federer: He served great in the breakers
Roger thinks that the big difference was Isner’s performance during the breakers "Does indoors maybe help him there a little bit? Potentially. He's got the size, got the power, got the angles. I thought he did very well today when he needed it. The 'breakers, he served great. Those are the ones he needed. That was the difference.
At the US Open, I won my tie-breakers. Here, I lost them. It's a pity. I didn't play a bad match. I haven't been broken during six sets against him, and I lost the match. This is how it happens against John. It's always on his racquet, especially indoors."