That is according to Federer’s former coach Paul Annacone, who says the trait was also evident in Pete Sampras and Tim Henman.
Federer boasts 19 Grand Slam titles, with two coming in 2017 at the age of 36.
The Swiss legend surpassed Sampras’ tally of 14 majors back in 2009 and has emerged from a barren spell to pick up where he left off.
Annacone coached Sampras and Henman at various points of their careers and took the reins of Federer’s mentor between 2010 and 2014.
And the American has identified why the reigning Wimbledon champion has kept winning into his mid-30s.
“All three of those guys had an amazing understanding of their own skill set,” Annacone told Express Sport.
“An understanding of what they do incredibly well.
“Sure, their talents are off the charts, so that’s one thing. But the second thing was they understood the strength of what they do on the tennis court.
“They know what they’re best at and they give themselves continued opportunities in the most pressure-filled situations to win or lose doing what they do well.
“Then if they lose they’re very pragmatic about it, because they try to use their biggest strengths in the biggest moments.
“And either on that day they didn’t get over the line, or the other guys was too good.
“So they can absorb the pain of the loss and then go back to the drawing board, go ‘OK this is what happened’.
“There’s a very strategic, meticulous process that they go through.
“They do love the victories and the pain of the defeats do sting.
“But not so much that they are drowning in either of those emotions.”