Jannik Sinner goes just long with a forehand and it's another straightforward service hold for Novak Djokovic.

Andre Agassi
Former Wimbledon champion on BBC One

I have to go with Jannik Sinner [as the favourite].

You have to look at Sinner as a better defensive and offensive player.

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These two met at the semi-final stage of Wimbledon last year and Jannik Sinner won in straight sets, before beating Carlos Alcaraz in the final.

Sinner, the world number one, holds to 15 to get himself on the scoreboard.

Harry Poole
BBC Sport at Wimbledon

I've watched both Jannik Sinner and Novak Djokovic several times this fortnight. I've watched them both up close during their hitting sessions.

I cannot call this one.

Logic would tell you that the 39-year-old Djokovic, 15 years the senior of world number one Sinner, should still be feeling the effects of his epic five-hour quarter-final against Felix Auger-Aliassime.

Neither of the players who have just walked out before us on to Centre Court are normal athletes, however.

All we can hope is that both can operate close to their very best levels and put on a real show here.

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Alfie Hewett seals the second set bagel, and it's anyone's game going into his wheelchair singles semi-final versus Gustavo Fernandez.

Hewett hit nine winners and got 62% of his first serves in during the second set, showing just how much he has improved from the first set where he was visibly very angry with his performance.

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Novak Djokovic holds serve fairly comfortably to open this second semi-final.

Some empty seats on Centre Court at the moment, no doubt because a few people are in a queue for refreshments somewhere after the first semi-final, but it'll soon be filled back up again I'm sure.

Tim Henman
Former British number one on BBC One

How will Novak Djokovic have recovered?

I know he has had 48 hours off but will there be a cost from that five-hour match against Felix Auger-Aliassime? That was a phenomenal effort.

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• Overall: 6-5 to Sinner
• At Grand Slams: 3-3
• In Grand Slam semi-finals: 3-2 to Sinner
• On grass courts: 2-1 to Djokovic

Who will win meeting number 12?

We're about to find out - Novak Djokovic, the seven-times Wimbledon champion, will serve first on Centre Court.

This is the Alfie Hewett we know and love.

The world number two has hugely raised his game in this second set, and thanks to a third successive break of Gustavo Fernandez he will shortly serve to level this semi-final.

John McEnroe
Three-time Wimbledon singles champion on BBC Two

I picked Jannik Sinner before the tournament, I'm not too sure now.

I think Novak Djokovic is hitting the ball better than Sinner at the moment.

We're watching something truly extraordinary that Djokovic can still do it and wants to do it. That's quite the commitment.

Novak Djokovic is into a record-extending 15th Wimbledon semi-final and is chasing what would be a record-equalling eighth men's singles title at SW19.

It was vintage Djokovic in the quarter-finals as the 39-year-old Serb outlasted Canadian third seed Felix Auger-Aliassime in a five-set epic that lasted more than five hours on Tuesday.

Jannik Sinner's Wimbledon title defence got off to a bit of a rocky start - the world number one needed five sets to beat Miomir Kecmanovic in round one.

Since then, it's been pretty straightforward for the Italian, who has not dropped a set in any of his subsequent four matches.

Alexander Zverev won his first Grand Slam title at the 41st attempt at the French Open last month.

Playing at the level he has shown in his past two matches, you wouldn't put it past him adding a second on Sunday.

Having wrapped up his last-four tie in a little over two hours, I'm sure he wouldn't mind the other semi-final being a five-set, five-hour epic between Jannik Sinner and Novak Djokovic.

That one is up next... and the players are walking through the corridors of Wimbledon on their way to Centre Court.

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A much improved start to the second set for Alfie Hewett, as he breaks opponent Gustavo Fernandez early doors in their men's wheelchair singles semi-final.

He finally, FINALLY manages to hold his own serve in order to consolidate the break - before breaking Fernandez again to take command of this set.

An hour and a half gone in this match, we could be in for the long haul.

Greg Rusedski
Former British number one on BBC Radio 5 Live

Zverev was very nonchalant about that [reaching Wimbledon final].

I thought the first set there was close, we were wondering what was going to happen, and then he just put the hammer down in that second set. But he was just making out like it was no big deal, like 'I'm back in a final where I'm supposed to be'.

He is playing well enough to win this tournament. We haven't seen Sinner's best yet, Djokovic we don't know how he has recovered. He must be licking his lips, and he is trying to get the crowd on his side too.

Brilliant to see what confidence, belief and sticking at something can do for you.

He was just by far the better player today.

More from Alexander Zverev who was asked whether it matters who his opponent is in the final on Sunday: "I hope I can play a junior! Whether it is the defending champion or someone who has won here 48 times with Novak Djokovic, it's not going to be easy no matter who it is against. I have to trust myself and I have to believe that I can win and that's what I'm going to do."

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Second seed Alexander Zverev speaks after beating Arthur Fery in straight sets to reach his first Wimbledon final: "It's amazing. This Grand Slam has always been the one that I have struggled with most and all of a sudden I am in the final of Wimbledon so I am incredibly happy, proud as well of the team and everyone who was involved. We have one more match to go on Sunday an that's what the focus is on."

On his performance today: "Yeah it was OK! It was amazing. I have to give credit to Arthur. Unbelievable player, he's going to be a senior citizen on our tour because I think he is going to play on this tour for 15 plus years. I think this was just the beginning of his career.

"I really think he is going to do amazing things in this sport. I know that 99.99% of the stadium was wanting Arthur to win but it was still such an incredible atmosphere with such a fair crowd, I enjoyed every second of it. A lot of stadiums in the world can learn from this crowd. It's one of the best crowds to play tennis in front of."

Alexander Zverev is the first German player to reach a Wimbledon singles final since Angelique Kerber won the women's title in 2018 and the first man to do so since Boris Becker in 1995.

He is also the 13th player in the Open Era (since 1968) to reach the men's singles final at all four Grand Slam tournaments.