LONDON — Much has changed for Roger Federer since he played in, and won, his first Grand Slam final at Wimbledon in 2003.
First of all, as he reminded everyone after moving into his 11th title match at the All England Club — with a shot at his eighth championship, more than any man in history — he favored a ponytail and some scruff on his cheeks way back then. Nowadays, his hair is short, his face clean shaven.
Another significant difference for Federer, whose 36th birthday is Aug. 8, making him the oldest men’s finalist at Wimbledon since 1974?
‘‘I didn’t have kids running around, potentially waking me up at night,’’ he said. ‘‘Today we've got to, like, close down the doors. Say, ‘Daddy is sleeping.’ ’’
He’s a father of four: twin boys, 3; twin girls, 8 soon.
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.’’
Federer is 30-2 and tied for the tour lead with four titles in 2017, including at the Australian Open. 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, 41 years ago. He’s only been broken four times, saving 16 of 20 break points.
‘‘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. The lone head-to-head win for Cilic: 6-3, 6-4, 6-4 in the semifinals of the 2014 US Open, where he went on to earn his only Grand Slam title.