On the court, there are ways in which the Federer who faces Marin Cilic on Sunday is not the same as the Federer who beat Mark Philippoussis 14 years ago. The larger racket, for example, or the increased willingness to hit over the top on his backhand.
In truth, though, what's most important is this: Federer is still as capable as ever of beating everyone who stands in his way.
"This guy doesn't really seem (to be) getting any older or anything like that," said Tomas Berdych, who lost to Federer in the semifinals, "or slowing down at all."
That's certainly the case.
Federer is 30-2 and tied for the tour lead with four titles in 2017, including at the Australian Open in January.
During Wimbledon, he has not lost a set through six matches; the last man to earn the title without ceding a set was Bjorn Borg, 31 years ago. He's only been broken four times, saving 16 of 20 break points along the way.
"Roger is playing maybe (some) of his best tennis of his career at the moment," said Cilic, the No. 7-seeded Croatian who hit 25 aces and returned quite well during his semifinal victory over Sam Querrey. "It's going to be a huge challenge."
They have played each other seven times previously, with Federer winning six, including in last year's Wimbledon quarterfinals. Cilic took the first two sets and even was one point from victory, before Federer came back.
The lone head-to-head win for Cilic came in one of the most significant matches of his career: 6-3, 6-4, 6-4 in the semifinals of the 2014 U.S. Open, where he went on to earn his only Grand Slam title.
"He knows he absolutely destroyed Roger," said Jonas Bjorkman, one of Cilic's two coaches.
That knowledge is key for this match, according to Bjorkman. So, too, is the past experience of participating in, and winning, a major final.
