Clobbered 6-1, 6-4, 6-3 by fiery Frenchman Gael Monfils, the 33-year-old Swiss champion opted to dismiss the downsides and ponder the positives.
Sidelined by a bad back for the five days leading into his first rubber in a Davis Cup final, Federer said he was listening to his body as Monfils bombarded him from all angles.
"From my side, I mean, as the match went on, I just started to loosen up," he said.
"I guess I needed to hit 30 big serves, I needed to slide, I needed to be in defense, I needed to play offensive tennis, get information quickly.
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More than the physical, it was the psychological side of things that was the problem for Federer, who has had a history of back pain throughout his career.
It is something, he says he has learned to live and play with over the course of the years.
"You don't have to be in unbelievably excruciating pain, but it takes a while for it to leave your mind. It's like a ghost, it's there, Whoa, be careful.
"But that's why it was good for me to play three sets today. Definitely gives us a lot of information.