Novak Djokovic wins longest Wimbledon quarter-final in history to secure place in 15th semi-final at SW19
Djokovic beats Felix Auger-Aliassime 7-6 (12-10) 3-6 6-3 6-7 (4-7) 7-6 (10-4) in extraordinary match lasting five hours and 15 minutes
Seven-time champion Djokovic, 39, had treatment for left calf problem in first set but battled on to keep alive hopes of a 25th Grand Slam title
Djokovic, the oldest men's semi-finalist in 50 years, will play defending champion Jannik Sinner next after he beat Jan-Lennard Struff
Karolina Muchova knocks out Naomi Osaka to set up semi-final against Coco Gauff
Gauff overcame fourth seed Jessica Pegula to reach her first Wimbledon semi-final
Alexander Zverev beats Jiri Lehecka in four sets to reach quarter-finals
Osaka 5-5 Muchova*
It's Naomi Osaka's turn for a comfortable service game - it's all very different to the start of this set.
A second-serve ace finishes it off.
I fancy we're heading for a tie-break. Bold prediction I know...
*Lehecka 4-6 5-7 6-3 4-5 Zverev
A comfortable hold for Alexander Zverev to move 5-4 up, so Jiri Lehecka will serve to stay in the match after the changeover.
Lehecka 4-6 5-7 6-3 4-4 Zverev*
Wonderful low backhand creeps just over the net from Jiri Lehecka to begin his latest service game.
A couple of Zverev errors and a Lehecka ace later, and it's another hold to love for the Czech 13th seed.
This fourth set seems to have tie-break written all over it...
Lehecka 4-6 5-7 6-3 4-4 Zverev*
Todd Woodbridge
Former Wimbledon doubles champion on BBC One
Alexander Zverev's level isn't currently anywhere near what he showed yesterday.
His serving has dipped but so has his forehand. They aren't anywhere near as dynamic or strong as he usually hits them. He is usually so confident on that forehand wing, but his forehand quality dipped from 9.3 and 9.2 in the first and second sets to 5.9 in the third set in the latter stages of yesterday.
Taking a look at today, it is down at 3.5. He has missed half of his forehands in this set, so he is doing well to hang in here.
Image source, Getty Images*Osaka 4-5 Muchova
Annabel Croft
Former British number one on BBC Radio 5 Live
Muchova is very calm, there's no stress in her face whatsoever.
*Osaka 4-5 Muchova
"Come on!" shouts Naomi Osaka after drilling a backhand that Karolina Muchova can't get back to make it 0-15.
That's as good as it gets for the Japanese 14th seed in this game, though.
Muchova is striking the ball just as well as Osaka, with perhaps marginally less power, and holds to 15.
Image source, Getty ImagesOsaka 4-4 Muchova*
Some brilliant defensive play from Karolina Muchova but, ultimately, it is not enough to stop a relentless Naomi Osaka, who is striking the ball immaculately.
Muchova responds with a fantastic return down the line for a winner but Osaka just keeps going and hammers a forehand deep into the corner to hold.
*Lehecka 4-6 5-7 6-3 3-4 Zverev
Image source, Getty ImagesNow then, is Alexander Zverev blinking first?
He's taken to deuce - but responds with a cracking ace out wide well out of Jiri Lehecka's reach.
Can't follow it up immediately, sending a backhand long - but two more brilliant serves, one out wide and one down the middle, both unreturnable, quell the danger. A hold but hard-earned.
*Osaka 3-4 Muchova
Pat Cash
Former Wimbledon champion on BBC Radio 5 Live
Once Osaka gets into it and gets going, she is near impossible to stop. She just hasn't been able to get into the game of Muchova yet.
*Osaka 3-4 Muchova
Annabel Croft
Former British number one on BBC Radio 5 Live
I think already Muchova is playing at a level that can definitely win this match. But, it's whether or not she can hold it when she has to.
Naomi Osaka is rattled because she hasn't played anyone like this.
Image source, PA Media*Heliovaara/Patten 2-6 6-4 6-6 (0-0) Andreozzi/Guinard
Top seeds Henry Patten and Harri Heliovaara will have to come through a first-to-10 tie-break on court two to reach the men's doubles semi-finals.
You can watch the conclusion of that match on the BBC iPlayer.
*Osaka 3-4 Muchova
A blink-and-you'll-miss-it service game from Karolina Muchova.
An excellent serve out wide can't be returned by Naomi Osaka and the Czech 10th seed holds to love.
Osaka 3-3 Muchova*
Harry Poole
BBC Sport at Wimbledon
And I thought Coco Gauff against Jessica Pegula was topsy-turvy!
It’s got nothing on the start to this match.
Four breaks of serve, a first hold of serve from Karolina Muchova, and now Naomi Osaka overcomes a break point to bring us level again.
You certainly can’t call it after the opening 25 minutes.
Lehecka 4-6 5-7 6-3 3-3 Zverev*
Todd Woodbridge
Former Wimbledon doubles champion on BBC One
Jiri Lehecka is physically strong and has power off both wings, but there are times where he doesn't show finesse. For me, that would be the one thing he could add into his game to enhance it.
For example, I like a sliced backhand to bring in an opponent and change the pace of a rally - and he doesn't seem to do that often enough.
He is also the sort of player that feeds off confidence. If he is feeling good, he plays big. But he isn't as good at winning matches when he isn't at his best. That's the consistency he is trying to develop.
Use "Get Involved" button on this page to send your question
Image source, PA MediaRegina in Reigate asked this question yesterday during Alexander Zverev's fourth-round match against Jiri Lehecka:
I'm a bit confused - I'm sure I saw Zverev using a mobile device during a changeover of ends... now I don't know exactly what he was looking at, but I thought all mobile devices were not allowed during a game.
Zverev has Type 1 diabetes and has a glucose monitor in his bag which he regularly checks. It helps regulate his glucose levels and tells him if he needs to inject any insulin.
He recently said the monitor malfunctioned during his match in Halle and he injected more than he needed., external
Players are not allowed to check their mobile phones during a match.
Osaka 3-3 Muchova*
Annabel Croft
Former British number one on BBC Radio 5 Live
I think there's not many players who come close to the way Muchova plays tennis and the construction of her points. She's incredible to watch.
You won't see a better serve and volley than hers.
Osaka 3-3 Muchova*
Just brilliant from Karolina Muchova.
From 0-30 she gets another break point, producing a brilliant drop shot and then works Naomi Osaka one way then the other on the next point, winning it with a push volley into the corner.
But Osaka had only been broken three times in the tournament before today for a reason and pulls out two big serves to get out of trouble before securing her first hold.
Lehecka 4-6 5-7 6-3 3-3 Zverev*
Jiri Lehecka needed a replacement banana at the change of ends because the one he had ready was, well, it seems, too hot to eat.
An indication of the roasting conditions these players are playing in. A ball girl comes to the rescue with a fresh, cooler, replacement.
Once again, the Czech's serve is similarly too hot to handle for Alexander Zverev - and even when the second seed can extend a couple of rallies, he errs into the net.
A cracking forehand around the net post seals a hold to 15.
Image source, Getty Images*Osaka 2-3 Muchova
Pat Cash
Former Wimbledon champion on BBC Radio 5 Live
I have a tennis crush on Muchova, she's the best player to watch. I love watching her play.
*Osaka 2-3 Muchova
Annabel Croft
Former British number one on BBC Radio 5 Live
Muchova walks so carefully around the court, it's like she's trying not to stand on some daisies on the grass or something. Very careful placement of the feet.
