After his breathtaking semifinal display against Murray yesterday, a month shy of his 34th birthday, the Scot - among others - said the ageless maestro had reignited the debate.
"He's a great sportsman, a great tennis player," Murray said after succumbing 7-5 7-5 6-4 in what Federer acknowledged as "definitely one of the best matches I've played in my career".
"I don't know if anyone's played as well as Roger maybe at that age. Serena [Williams] obviously on the women's side is doing it. But they're pretty rare athletes."
Federer has the chance to end all arguments and stand alone as undoubtedly the greatest tennis player with success over his most enduring grand slam rival at a time when 28-year-old Djokovic is at the peak of his own powers.
An eight-times major winner, Djokovic broke new ground when he saw off Richard Gasquet 7-6 (7-2) 6-4 6-4 earlier yesterday to qualify for the finals of the Australian Open, French Open and Wimbledon in a single season for the first time.
"It's great to play Novak anywhere these days because he's a great player," he said. "He's had great success, unbelievable success actually, throughout his career. But especially now the last few years, he's been unbelievably dominant.
"He's become very match-tough. He always shows up. It's tough to beat him. He's been good for the game."
Djokovic edged Federer in a five-set classic last year and is bidding to join his coach Boris Becker as a three-time Wimbledon champion in his fourth final, having also reigned in 2011.
Tonight's will be the 13th grand slam meeting between Federer and Djokovic, with the two giants of the game splitting the previous dozen.
No two men have clashed more at the majors, with Djokovic's victory in last year's final at SW19 atoning for his loss to Federer in the 2007 US Open decider.
The world No 1 is a marginal favourite, but Federer is performing at another level in 2015 and has won an astonishing 140 of his last 141 service games, facing just five break points all tournament.
"We shouldn't spend too much words about him. We all know how good he is," Djokovic said. "He's the greatest ever. There's not enough praises for what he does.
"This is where he loves to play. This is where he plays his best tennis, I think - the centre court of Wimbledon, seven titles.
"It's his court. He loves it. He usually rises up to the occasion.
"It's going to be probably the biggest challenge I can have."
- AAP
