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
Pegula 6-4 3-6 3-4 Gauff*
Harry Poole
BBC Sport at Wimbledon
We are set up for a big finish to the opening match on Centre Court.
You always want big match-ups to be won by excellence and not errors.
Both players are hinting at improving levels, but the consistency isn't there for either, so I suspect we can probably expect a couple more twists and turns before this one is decided...
*Heliovaara/Patten 2-6 0-0 Andreozzi/Guinard
Image source, Getty ImagesGreat Britain's Henry Patten and Finnish partner Harri Heliovaara, the top seeds in the men's doubles, have lost the first set of their quarter-final against eighth seeds Guido Andreozzi of Argentina and Manuel Guinard of France.
You can watch that match or choose an alternative court to view on the BBC iPlayer.
Sinner 7-5 7-6 (7-4) 2-1 Struff*
Jannik Sinner hasn't really attacked Jan-Lennard Struff's second serve but on this occasion he doesn't need to, with Struff losing his radar and sending a forehand long. 15-30.
At 30-all, he gets another look at a second serve and this time, he goes for it, hammering deep return after deep return as he creeps up the court before Struff fires one wide.
Pegula 6-4 3-6 3-4 Gauff*
Coco Gauff has shown throughout this match that she will always fight.
Having finally got her game to a level she'd be happy with, she is broken and the match is back in the balance.
No bother, Gauff comes out firing and breaks Jessica Pegula to love. Big time response - and you should expect no less from a two-time Grand Slam champion.
Pegula 6-4 3-6 3-3 Gauff*
Tracy Austin
Two-time Grand Slam champion on BBC One
A great job by Jessica Pegula! She just started adding a little sense of urgency and injecting some more energy to her legs. She got down a little lower to her shots and she moved forward more. It was better ball-striking overall with much more aggression behind it.
She is so good at knowing what she needs to do to stay in matches.
*Pegula 6-4 3-6 3-3 Gauff
Pam Shriver
Five-time Wimbledon doubles champion on BBC Radio 5 Live
Best point of the match by far!
Extraordinary drop shot from Gauff. Pegula read it but the way the ball bounces off this grass, she had no chance.
*Pegula 6-4 3-6 3-3 Gauff
Another twist in this match!
Just as I was writing that Coco Gauff was looking confident with her serve, there's the double-fault... 30-30.
But what follows is the best point of the match!
A full-throttle rally with both players charging along the baseline before Gauff produces a stunning backhand drop shot.
Another long rally is won by Pegula, though. Deuce and then break point.
First serve in but the return is good and Gauff can only put her backhand into the net. Back on serve in this deciding set.
Image source, Getty Images
Emily Salley
BBC Sport at Wimbledon
Very wholesome.
A little kid shouts out "go Jannik" which earns an "awww" from the crowd and a smile from the man himself.
Sinner 7-5 7-6 (7-4) 2-1 Struff*
Image source, Getty ImagesBit loose from Jannik Sinner, blasting a forehand long on the approach. 15-all.
Jan-Lennard Struff wrong-foots Sinner with a brutal forehand winner but then plants a routine stroke into the net. 30-all.
An ace down the T and a forehand drop shot secure the hold for Sinner.
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When is the resumption of the Alexander Zverev match?
Haniff, London
Zverev and Jiri Lehecka will resume their fourth-round match on Centre Court after the conclusion of the Jessica Pegula-Coco Gauff quarter-final.
Zverev won the first two sets and it's level at 3-3 in the third.
We've spotted that for some reason that match doesn't appear in our scores and order of play for today, but we can assure you that that's when it will be!
Emily Salley
BBC Sport at Wimbledon
I'm spotting a lot of orange in the crowd today. Hardly a coincidence given Jannik Sinner is playing.
There's no sign yet of the Carota Boys - Sinner's loyal fan club who dress up in carrot costumes - but I can see a few people dressed head-to-toe in orange, including a father and son duo who are on their feet every time the Italian wins a point.
*Sinner 7-5 7-6 (7-4) 1-1 Struff
Oh yes! Down 40-15 and with Jan-Lennard Struff camped at the net, Jannik Sinner slides into a backhand lob which nestles on the baseline. A chasing Struff returns long.
But Struff holds with another 130mph+ rocket of a serve.
Pegula 6-4 3-6 2-3 Gauff*
Harry Poole
BBC Sport at Wimbledon
How quickly things can change in tennis. It looked like it was going to be one of those days for Coco Gauff, but she has has been terrific in this third set.
Perhaps it has made this trickier for Jessica Pegula that this is no longer the opponent she was getting the better of earlier on. Now, it's the fourth seed who needs to start finding answers - and fast.
Clearly lots of support for Coco Gauff here, but there's still a tense atmosphere given the topsy-turvy nature of the match so far.
Pegula 6-4 3-6 2-3 Gauff*
Image source, Getty ImagesThe match is threatening to get away from Jessica Pegula as she finds herself down 0-30 on serve.
However, the fourth seed - the highest seed left in the women's singles, in fact - steadies herself and rattles off the next four points to hold.
*Pegula 6-4 3-6 1-3 Gauff
Tracy Austin
Two-time Grand Slam champion on BBC One
When Coco Gauff decides to come forward, it is almost like she hits the forehand because her foot isn't up in the air and she isn't leaning backwards. She really does play more front-footed tennis.
It is counter-intuitive that when you're aggressive with your racquet-head speed and you get a little bit of top spin, it is actually better than just guiding the ball.
Pegula 6-4 3-6 1-2 Gauff*
Pam Shriver
Five-time Wimbledon doubles champion on BBC Radio 5 Live
Pegula has to think, what did she do at the start of the match?
She was striking it hard and flat. Coco [Gauff] has elevated her game but Pegula still has to break down that forehand wing.
*Pegula 6-4 3-6 1-3 Gauff
Celebrations in the box as Coco Gauff whips a forehand past Jessica Pegula to secure the hold and consolidate the break.
The American seventh seed is looking much more composed now, the early uncertainty has gone.
She's up to seven aces now and her issues on serve seem to have cleared up.
Image source, Getty ImagesSinner 7-5 7-6 (7-4) 1-0 Struff*
A trouble-free hold to love for Jannik Sinner is celebrated with an enthusiastic racquet shake.
Pegula 6-4 3-6 1-2 Gauff*
Pam Shriver
Five-time Wimbledon doubles champion on BBC Radio 5 Live
Gauff has really cleaned up her game; 17 unforced errors in that first set and only nine since.
*Sinner 7-5 7-6 (7-4) 0-0 Struff
Jannik Sinner returns from his comfort break wearing his towel around his shoulders like a cape.
There's a little bit of swagger in his step, a far cry from the visible frustration he showed midway through the second set when he allowed Jan-Leonard Struff to break right back.
