LIVE: Felix Auger-Aliassime wins fourth set tie-break to take Novak Djokovic to final set decider on Centre Court
Quarter-final sets: Djokovic 7-6 (12-10) 3-6 6-3 6-7 (4-7) Auger-Aliassime
Seven-time champion Djokovic had treatment for left calf problem in first set
Winner 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
Alfie Hewett wins in first round of men's wheelchair singles but fellow Briton Gordon Reid knocked out
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*Auger-Aliassime 6-7 (10-12) 6-3 3-6 7-6 (7-4) 0-1 Djokovic
Novak Djokovic holds - and it should be to love.
However, he gets a bit lax with what should be a simple volley at the net and puts it wide.
No bother, he gets it done next point as Felix Auger-Aliassime's returns sails wide.
Auger-Aliassime 6-7 (10-12) 6-3 3-6 7-6 (7-4) 0-0 Djokovic*
Naomi Broady
Former British player on BBC One
This match feels completely hung in the balance at the moment.
Some great improvements made by Felix Auger-Aliassime, he halved his forced errors in that fourth set. He was down on the points played in attack but he managed to neutralise that as the set continued on.
Novak Djokovic just wasn't able to neutralise the aggression of Auger-Aliassime.
*Auger-Aliassime 6-7 (10-12) 6-3 3-6 7-6 (7-4) 0-0 Djokovic
Here we go again. Novak Djokovic gets the fifth set under way.
Auger-Aliassime 6-7 (10-12) 6-3 3-6 7-6 (7-4) 0-0 Djokovic*
Nick Mullins
Tennis commentator on BBC One
Four hours and four minutes - and Jannik Sinner still waits to find out who he will play in the semi-final.
It might yet be Felix Auger-Aliassime!
Auger-Aliassime 6-7 (10-12) 6-3 3-6 7-6 (7-4) Djokovic
We're going the distance!
Novak Djokovic finds only net and the match is almost symmetrical.
A tie-break win apiece and a 6-3 win apiece.
Who's going to win this now? A bare-chested Djokovic is gesturing dramatically at his coaching box at the changeover.
Image source, PA MediaAuger-Aliassime 6-7 (10-12) 6-3 3-6 6-6 (6-3) Djokovic*
Auger-Aliassime clatters down a sensational serve and finishes off with a mammoth smash.
And Djokovic goes long next point - three set points for the Canadian!
Two set points actually... ace.
*Auger-Aliassime 6-7 (10-12) 6-3 3-6 6-6 (4-3) Djokovic
An arcing Djokovic ace out wide keeps his hopes alive.
Auger-Aliassime 6-7 (10-12) 6-3 3-6 6-6 (4-2) Djokovic*
But now Auger-Aliassime forces the error into the net from Djokovic after a barnstorming rally.
Mini-break back in the Canadian's favour - three points from taking us to a deciding set.
Image source, PA MediaAuger-Aliassime 6-7 (10-12) 6-3 3-6 6-6 (4-2) Djokovic*
Todd Woodbridge
Former Wimbledon doubles champion on BBC One
What a smart return from Novak Djokovic! He hasn't been able to utilise it very often but we have talked about trying to get Felix Auger-Aliassime out of position.
He likes to land and fall left, so targeting straight hard into the forehand corner there draws that error. This is where Novak Djokovic is brilliant at being able to change things in key moments.
Auger-Aliassime 6-7 (10-12) 6-3 3-6 6-6 (3-2) Djokovic*
Good golly, Auger-Aliassime pings a superb forehand into the corner of the court and follows up with an emphatic smash when Djokovic lobs the ball back up.
However, an excellent return from the Serb negates the mini-break. Back on serve.
Image source, PA Media*Auger-Aliassime 6-7 (10-12) 6-3 3-6 6-6 (2-1) Djokovic
Tim Henman
Former British number one on BBC One
It looked like Felix Auger-Aliassime was waiting for that serve to the forehand but couldn't quite control it.
*Auger-Aliassime 6-7 (10-12) 6-3 3-6 6-6 (2-1) Djokovic
Speaking of big hits... Felix Auger-Aliassime hammers down an ace to begin the breaker.
And then he comes into the net to dispatch a volley for the early mini-break...
Good Djokovic serve out wide limits the damage though. But still, advantage to the Canadian.
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Can't get my head round the fact that Wimbledon's Centre Court capacity is just shy of 15k. That's 2.5k more than AFC Bournemouth's home ground. Can't quite compute it
Mike, Eastbourne
*Auger-Aliassime 6-7 (10-12) 6-3 3-6 6-6 Djokovic
Yep, we're going to a tie-break. Great resilience there from Djokovic who did not shrink away from the situation. Some big hits.
Emily Salley
BBC Sport at Wimbledon
We're at that point where members of the crowd are stretching their limbs after being sat down for so long. Novak Djokovic and Felix Auger-Aliassime are putting them through the wringer.
Auger-Aliassime 6-7 (10-12) 6-3 3-6 6-5 Djokovic*
Blinking heck, Auger-Aliassime really attacks a second serve but batters it into the net.
Djokovic dominates the following point and it's back to 30-30.
Auger-Aliassime 6-7 (10-12) 6-3 3-6 6-5 Djokovic*
That won't help Novak's mood.
Auger-Aliassime smashes the top of the tape with a forehand - and the ball drops over the other side of the net.
It's 0-30. Two points from a deciding set...
Auger-Aliassime 6-7 (10-12) 6-3 3-6 6-5 Djokovic*
Tim Henman
Former British number one on BBC One
Novak Djokovic was definitely a little frustrated about the amount of times Felix Auger-Aliassime hit the line in that last game - a serve, a forehand, a drop shot.
They are there to be aimed at though!
Image source, Getty ImagesAuger-Aliassime 6-7 (10-12) 6-3 3-6 6-5 Djokovic*
Novak Djokovic holds up his arms in disbelief and despair as an Auger-Aliassime drop shot clips the tramline.
The Canadian is not going into the night quietly.
Djokovic must serve to stay in the set.
*Auger-Aliassime 6-7 (10-12) 6-3 3-6 5-5 Djokovic
Nick Mullins
Tennis commentator on BBC One
There is still clearly a long way to go here, but if you're wondering how long ago it was when Novak Djokovic last lost a two sets to one lead here at Wimbledon, here is your answer.
20 years against Croat Mario Ancic. We are a long way from that, but let's put that little post-it note up on the fridge. Essentially, Djokovic does not lose these kinds of advantages at Wimbledon.
