Watch and listen to live BBC coverage of day 12 at Wimbledon (UK only)
Jannik Sinner claims dominant straight-set win over Novak Djokovic to reach final against Carlos Alcaraz
Pair played an epic French Open final just five weeks ago, with Alcaraz winning
Two-time defending champion Alcaraz earlier beat Taylor Fritz to extend winning streak to 24 matches
Sinner and Alcaraz are world number one and two respectively
Alcaraz has won five majors and Sinner three
Fritz 4-5 Alcaraz*
Andrew Castle
BBC Sport tennis commentator on BBC One
You have to hit three winners sometimes to win a point from Alcaraz.
Fritz did well to save set point there.
Survival for Taylor Fritz. Now, can he break?
Fritz 4-5 Alcaraz*
Danger averted for now for Taylor Fritz, who saves a set point on his own serve before holding.
But he must break serve now otherwise Carlos Alcaraz will be one-third of the way towards another Wimbledon final.
The physio is on for Fritz - he cut his elbow earlier in the tournament and it's now scabbed over, but it looks like he might have opened it up again with that dive at the net.
*Fritz 3-5 Alcaraz
BBC One
Carlos Alcaraz slides a forehand past a diving Taylor Fritz at the net for 30-30.
Two points from the set.
Meanwhile, coverage of this match has switched from BBC Two to BBC One.
*Fritz 3-5 Alcaraz
Andrew Castle
BBC Sport tennis commentator on BBC One
Every now and again he just does something that transforms people's perception.
The forehand with the amount of spin and shape on it - it's just an incredible thing.
Alcaraz just looks in control of his game at the moment. It is an uphill battle for Taylor Fritz so far.
*Fritz 3-5 Alcaraz
It won't be in this game when Taylor Fritz breaks Carlos Alcaraz.
As routine a hold as you'll see, wrapped up with a serve-and-drop volley that is simply delightful.
Fritz 3-4 Alcaraz*
Andre Agassi
Former Wimbledon champion on BBC Two
Is there any point that Carlos doesn't care about?
He looks up to his box and pumps his fist at 40-15 like he might have a chance to break.
Image source, Getty ImagesFritz 3-4 Alcaraz*
Taylor Fritz must be regretting that opening game, when he lost his serve.
Since then he's been pretty solid while serving and not under any massive pressure from Carlos Alcaraz.
Now the American has to find a way to break back - and soon - to prevent himself falling a set behind.
Sinner v Djokovic
Laura Scott
BBC sports news correspondent at Wimbledon
Like Jannik Sinner, Novak Djokovic has been out practising today. And like Sinner, he's had an injury concern coming into their semi-final.
The Serb fell over towards the end of his quarter-final, almost doing the splits in a very painful-looking tumble.
He told me he’s feeling "good" and "feeling all right" when he arrived at the warm-up area.
I’ve definitely seen Djokovic hit harder than this on the practice courts, he hasn’t been full throttle at all and hasn't been doing much running, but it is roasting out here.
*Fritz 2-4 Alcaraz
Taylor Fritz gets to 30-30 on the Carlos Alcaraz serve but the Spaniard rattles off a couple of points in a row to move 4-2 in front.
Fritz 2-3 Alcaraz*
Andre Agassi, the Wimbledon champion in 1992 and one of the legends of tennis, is in the BBC TV commentary box alongside Andrew Castle and Tim Henman for this first semi-final.
Fritz 2-3 Alcaraz*
Gary Rose
BBC Sport at Wimbledon
Carlos Alcaraz had his eye looked at during the changeover as it was still bothering him, but he looks OK as he steps up to serve.
One to keep an eye on, so to speak.
Image source, Getty ImagesFritz 2-3 Alcaraz*
Andre Agassi
Former Wimbledon champion on BBC Two
Oh no, this happened to Alcaraz in the French [with his eye].
He had a clunker after that.
This one doesn't seem to have lasted that long, which is good.
Fritz 2-3 Alcaraz*
Gary Rose
BBC Sport at Wimbledon
"Come on, Carlos," is shouted from one area around Centre Court.
"Come on, Fritz," someone else shouts.
"Come on, Roger," another person quips, prompting chuckles from those around him.
That's the only time there's a bit of a light relief as it is tense silence otherwise, with all eyes transfixed on this encounter.
Fritz 2-3 Alcaraz*
A first double fault of the match halts Taylor Fritz's progression towards winning the game, as does something that may have flown into the eye of Carlos Alcaraz.
He calls down the chair umpire to take a look and rubs it with a towel, before returning to his returning position.
Fritz hammers down an ace so Alcaraz will get the chance to get it sorted now during the changeover.
*Fritz 1-3 Alcaraz
Taylor Fritz attacks a couple of second serves from Carlos Alcaraz and ends those points with winners, but when the Spaniard gets his first serve in there's only been one victor so far in this game.
The defending champion restores his two-game advantage.
Fritz 1-2 Alcaraz*
Andre Agassi
Former Wimbledon champion on BBC Two
Image source, Getty ImagesIt is not so much that Fritz doesn't have a chance, he has a chance but he has to execute everything perfectly and on time.
Doing that over the duration of a match is difficult to do.
Sinner v Djokovic
Melissa Sharman
BBC Sport senior journalist
Jannik Sinner was out practising early this morning, before his encounter with Novak Djokovic later today.
He's still got his right arm strapped because of the elbow injury he's been dealing with this week but was showing no sign of it bothering him.
He has been practising every element of his game and had to use a towel often to mop off the sweat, as it’s so hot out here.
Fritz 1-2 Alcaraz*
Taylor Fritz gets his serve working to get himself on the scoreboard with an easy hold.
*Fritz 0-2 Alcaraz
Andre Agassi
Former Wimbledon champion on BBC Two
Fritz needs to open the up the court to get the chance of first-strike tennis.
If he gets too much into a rally then there is too much athleticism and physicality on the other side.
*Fritz 0-2 Alcaraz
Carlos Alcaraz backs up the break of serve with a hold to love.
The defending champion is on top early on.
