Image source, Getty Images

The paying punters on Centre Court have the added bonus of an extra men's singles match this afternoon.

Well, part of one anyway - German second seed Alexander Zverev went two sets up on Czech Jiri Lehecka last night but play had to stop because of the Wimbledon curfew of 23:00 BST.

Zverev - who broke his Grand Slam duck by winning the French Open this year - is bidding to reach the SW19 quarter-finals for the first time and set up a last-eight tie with American Taylor Fritz.

Given he's lost his past seven meetings with Fritz, and that the German will have a day's less rest, Zverev will want to finish things as quickly as possible this afternoon.

World number seven Coco Gauff, speaking on Centre Court after beating Jessica Pegula to reach her first Wimbledon semi-final: "Honestly it is pretty insane, considering I hadn't won a match on grass in two years before this tournament. I'm definitely really happy with how I played today. Jessica [Pegula] is an incredible opponent and person, playing against her is never easy so I'm just happy to get through this one today.

"I knew her balls would be so flat and low, so I just needed to trust that I could hang in the rallies and play the tennis I wanted to play. I started to land more first serves in the court which I think also helped. In the first set, I made a few too many errors rushing out a little bit too quickly in the rallies. But I felt like in the last two sets I played some really great tennis.

"I've been going to three sets almost every match so I feel like when you have that faith in yourself as a competitor, when the match goes the distance or you lose one set, then it stops you from panicking."

On the expectation on her after a successful debut at Wimbledon in 2019: "That might be the case for some people, but I think a lot of people had me going out in the first or second round this tournament - for that reason I'm just happy to get through to the semi-finals. After seven years playing in this tournament, it is the first time I've walked onto Centre Court and not felt nervous. So I don't know if I'm becoming a veteran already?

"It's funny because when they had us waiting before walking onto court, I was looking at all the decorations and the art pieces back there because it is so beautiful. But then I literally had to tell myself to look at the doors so I could focus on the match. I'm just really enjoying the process of being here and playing at Wimbledon this year."

John Lloyd
Former GB Davis Cup captain on BBC Two

Jannik Sinner came through when he needed to there. His serve was brilliant today. He will obviously be happy with three sets going into the semi-finals. You cannot ask for more than that against a dangerous opponent who took his chances and had a lot of weapons going for him.

Sinner just had too much class and played too well on the big points. I would give him a B grade for that performance today.

John McEnroe
Three-time Wimbledon singles champion on BBC Two

Well Jannik Sinner lost to Novak Djokovic in the semi-finals of the Australian Open, so that will give him something to think about. For now, though, he will be happy to be through this match in straight sets. He was set point down in the second set, remember, so this could've been a very different match.

It was a career milestone for Jan-Lennard Struff. God bless him to get there and battle the way he did. I'm glad he got a huge round of applause.

Andrew Castle
BBC Sport tennis commentator on BBC Two

Image source, PA Media

It is five match wins and counting for Jannik Sinner. He can rest and sit back as Felix Auger-Aliassime and Novak Djokovic face off later on.

Facing either one of them in the next round is a thing for another day.

Emily Salley
BBC Sport at Wimbledon

Another job done for Jannik Sinner. It wasn't his best performance and he certainly didn't blow Jan-Lennard Struff away, but he acts decisively in the right moments to get across the finish line.

Greg Rusedski
Former British number one on BBC Radio 5 Live

Jannik Sinner is always the title favourite. He'll be delighted to come out through straight sets but, he hasn't been in any major finals this year.

Huge ovation for Jan-Lennard Struff as he leaves Court One.

The 36-year-old was playing in his first Grand Slam quarter-final but couldn't take his opportunities in the big moments.

He took Sinner to deuce in three first-set service games and had a set point in the second, but couldn't get near the Italian's serve in the second-set tie-break.

Jan-Lennard Struff climbs all over a second serve for 30-15.

Darren Cahill stands up and offers some encouragement from Jannik Sinner's box.

Sinner goes big down the T. Match point.

Pam Shriver
Five-time Wimbledon doubles champion on BBC Radio 5 Live

Of course Gauff can win it all. I could do an argument for any one of the players left in this tournament but, when you look at Gauff, she's won two majors, recently. Osaka hasn't won them since 2021.

It's setting up to be another fascinating end on the women's side.

Image source, Getty Images

Off a second serve, Jan-Lennard Struff rushes the net and Jannik Sinner drags his cross-court backhand into the net. Would he have been better going down-the-line for the pass? Felt like the easier shot.

It makes no difference. On his second break point, Sinner returns deep, pounds a down-the-line backhand, follows it with a cross-court forehand and watches Struff's return sail long.

Huge opportunity for Jannik Sinner late in the third set! He's up 15-40 without having to hit a winner.

Emily Salley
BBC Sport at Wimbledon

What's going here?! The roof has started closing over on Court One.

It's only moved a little, so maybe it's just to give a bit of shade to the fans in the stands. There were quite a few heat-related medical incidents yesterday.

British pair Lucy Shuker and Cornelia Oosthuizen have both been beaten in the first round of the women's wheelchair singles, losing their respective matches in straight sets.

Earlier, Alfie Hewett and Andrew Penney were victorious in the men's wheelchair singles, but Gordon Reid and Ben Bartram were eliminated.

Pam Shriver
Five-time Wimbledon doubles champion on BBC Radio 5 Live

An hour and 40 minutes, usually three sets like this takes two-and-a-half hours.

They played so quickly between points, it was kind of old school.

Harry Poole
BBC Sport at Wimbledon

Another topsy-turvy Coco Gauff classic, which certainly had the Centre Court crowd engrossed here.

She made four double faults and 17 unforced errors in the first set, but just three double faults and 15 unforced errors across the remainder of the match.

Gauff raises her arms aloft after coming through that tricky challenge against American number one Jessica Pegula, which should give her plenty of confidence going forward on a surface she hasn't exactly thrived on.

Jan-Lennard Struff gets on top of a baseline exchange, hitting flat and driving Jannik Sinner back until the top seed makes an error. 15-all.

The pair trade points for 30-all.

Sinner angles a second serve which Struff can only chip back into court, opening the door for a couple of booming Sinner forehands, and closes out the hold with an ace.

Pat Cash
Former Wimbledon champion on BBC Radio 5 Live

That was a good effort because Gauff was having all sorts of timing issues in that first set and the majority of that second set.

Once her first serve clicked, boom.

It's incredible how many times she's not played well but is somehow able to get through the match.