LONDON — Roger Federer was on the decline — or so the thinking went.
He was past 30. Had back problems. Tried experimenting with a larger racket. Was a family man, a father to two sets of twins now. Slid down the rankings. Reached zero Grand Slam finals over the past two years. Started losing before the quarterfinals at majors, including in 2013's second round at Wimbledon, of all places, to a guy ranked 116th.
Look at him now. Federer is one victory from a record eighth Wimbledon championship and 18th Grand Slam title overall.
Asked how much it would mean to add to his trophy collection, Federer, who turns 33 next month and would be the oldest Wimbledon winner in at least a half-century, said: "A lot. I know I don't have 10 left, so I'll try to enjoy it as much as I can."
Could he have imagined 12 months ago, after his startlingly early exit, being in this year's final? "I wasn't sure," Federer replied. "I hoped."
After so much buzz about the rise of a new generation to challenge the supremacy of the "Big 4" — a quartet that includes Rafael Nadal and Andy Murray and that will have won 36 of the past 38 Slams — Federer and Novak Djokovic turned aside up-and-comers in Friday's semifinals.
No. 1 Djokovic, the 2011 champion, went first, overcoming dips in his play to beat 11th-seeded Grigor Dimitrov of Bulgaria 6-4, 3-6, 7-6 (7-2), 7-6 (9-7) and reach his third final at Wimbledon and 12th major final in the past 16.
Federer, tied with Pete Sampras and William Renshaw with seven Wimbledon titles, followed with a 6-4, 6-4, 6-4 victory over 11th-seeded Milos Raonic of Canada. Returning serves that topped 130 mph, he broke Raonic once in each set and took 61 of 80 points on his own serve.
"Just seeing Roger around, seeing his persona, his aura — you know that a lot of people could have, and have, written him off in a lot of ways," Raonic said, "(but) you knew this was very (possible) for him."
Dimitrov (who beat defending champion Murray in the quarterfinals) and Raonic (who beat the man who beat Nadal in the fourth round) are 23 and made their debuts in a Slam semifinal. Federer was in his 35th; six-time major champion Djokovic was in his 23rd.
It was sunny, 77 and windy, and Djokovic and Dimitrov found themselves slip-sliding around the worn Centre Court, especially along swaths of brown dirt. Djokovic appeared ready to run away with a win, one point from leading by a set and two breaks. But Dimitrov, cheered on by girlfriend Maria Sharapova, hit an ace to erase a break point and reeled off five consecutive games to grab the second set.
Djokovic was volleying poorly — something that surely bothered one of his coaches, three-time Wimbledon champ Boris Becker — and generally struggling to find his strokes. After one botched forehand, Djokovic threw his racket end-over-end in the air and caught it.
"It was a roller coaster," Becker said of his man's up-and-down performance. "It doesn't have to be pretty and perfect all the time. You have to play perfect when it matters most."