That brings our coverage of today's action at the Australian Open to a close.

Thanks for joining us and see you tomorrow for the rest of the quarter-finals!

Four quarter-finals down, four to go. Here's tomorrow's singles schedule on Rod Laver Arena...

From 00:30 GMT

Madison Keys [19] v Elina Svitolina [28]

Emma Navarro [8] v Iga Swiatek [2]

Ben Shelton [21] v Lorenzo Sonego

From 08:30

Jannik Sinner [1] v Alex de Minaur [8]

Away from Novak Djokovic's win against Carlos Alcaraz, the other men's quarter-final today saw Alexander Zverev beat Tommy Paul.

The German second seed set up a semi-final match with Djokovic with a hard-fought win 7-6 (7-1) 7-6 (7-0) 2-6 6-1 against the American 12th seed.

In the women's side of the draw, Belarusian top seed Aryna Sabalenka survived a scare as she beat Russian 27th seed Anastasia Pavlyuchenkova in three sets.

Sabalenka will face Spanish 11th seed Paula Badosa in the last-four after she stunned American third seed Coco Gauff in a 7-5 6-4 victory.

On setting up a semi-final against Alexander Zverev on Friday, Djokovic said: "God knows when I'm going to go to sleep! I guess the key is recovery for me now. To be honest, that is all I'm thinking about. The extra day without a match comes at the perfect time for me.

"Let's see if it's going to be good enough on Friday. Hopefully I can come out and feel my best because Sascha is playing some of the best tennis he has ever played. We have an agreement that as long as I'm playing, he has to let me win Grand Slam matches!"

On having to play the long game against Carlos Alcaraz: "I'm surprised that my kids are still here! I love you and thank you for supporting me, but it is 1am. When are you going to sleep tonight? They don't want me to speak about them. Fine, let's get back to tennis!

"Back in 2023, I actually had a similar injury and I carried it basically from the beginning of the tournament. I just had to go for my shots more. Honestly, sometimes it helps and I felt it definitely helped in the second and third sets here.

"We are so nervous on the court. There is a lot happening and you are going through emotional turmoil, so any point can really shift the momentum to the other side, particularly when you play against a champion like Carlos. He brings the energy and competitive spirit to the court, so I have to come out and be at my best. I knew that.

"In that perspective, I think it does help mentally because all of a sudden you just start to play a bit more aggressively and you play through your shots more. I guess that's going to be necessary for me when I face Sascha Zverev in the semi-finals."

Image source, Reuters

Novak Djokovic after working through injury to seal his semi-final spot: "Well, I guess I did it with my two legs and two arms! I had one and a half legs actually. I want to say my utmost respect and admiration for Carlos, everything he stands for and what he has already achieved in his young career. What a terrific guy he is and an even better competitor. He is the youngest ever number one in the history of our sport, four Grand Slams, so I'm sure we are going to see a lot of him. Maybe not as much as I would like, but he is going to be there longer than me for sure. I just wish this match today was the final.

"I don't know if Sascha Zverev is still awake at 1am watching this, I'm sure his team is. That was just one of the most epic matches I have played on this court, on any court really! Thank you all so much for staying until 1am to watch and support us."

Image source, Reuters

On needing to take a medical timeout during the match, Djokovic said: "Since I'm still in the tournament, I obviously don't want to reveal too much. The medication started to kick in and it helped, no doubt about it. I had to take another dose - I mean this sounds awful that I had to take another one - but I had to.

"If I had lost that second set, I don't know if I would have continued playing but I felt better and better. I managed to play a great couple of games to close out the second set and then I saw Carlos was hesitant from the back of the court and I took my chances. Then I started to feel better, started to move better and it didn't bother me or create any hinderance at the end of the match.

"When the medication starts to wear off, I will see what the reality is tomorrow morning. Right now, I will just try to be in the moment and enjoy this victory."

If Novak Djokovic is experiencing the Andy Murray effect, what exactly is it? What does a tennis coach actually do?

Preparing players, studying opponents, booking practice courts...there is a lot more to it than you think.

Click here to watch, external GB Davis Cup captain Leon Smith explain all.

That victory over Carlos Alcaraz earns Novak Djokovic a semi-final matchup against Alexander Zverev.

The German second seed beat American 12th seed Tommy Paul earlier today in a hard-fought win over four sets.

We'll have full post-match quotes from Djokovic shortly.

Novak Djokovic clenches both fists and roars in the direction of his coaching team.

The Serb looked in serious trouble at the end of that first set as he moved gingerly around court, but fought back magnificently.

You would not bet against him going on to secure an 11th title in Melbourne after a performance like that.

That's one point down as Carlos Alcaraz can't get back a Novak Djokovic second serve.

The Serb then skews a backhand wide as he loses his balance but recovers on the next point with a forehand down the line which sees Alcaraz diving in vain to return it.

Djokovic then brings up match point as Alcaraz puts a backhand long.

Annabel Croft
Former British number one on BBC Radio 5 Live and BBC Sounds

This game couldn't have been better, could it?

It has had so many twists and turns and tactical changes. There has been brilliance from the back and lung-busting rallies.

We really have been treated to something pretty special in this contest.

We don't know how long Novak Djokovic is going to keep going but, whilst we can enjoy such an extraordinary rivalry between the two of them, it is really living up to expectations.

Carlos Alcaraz gets to 40-15 with an ace before landing another big serve which Novak Djokovic can't return.

Djokovic will now serve for the match and a place in the Australian Open semi-finals.

Annabel Croft
Former British number one on BBC Radio 5 Live and BBC Sounds

Well, I need to take a deep breath after that service game.

Novak Djokovic has just got nerves of steel. It wasn't looking good at 15-40 in that service game but he just came up with some brilliant serving.

We had some falling over and a bit of everything else in that game!

Novak Djokovic earns advantage but takes a tumble in the process - he seems alright though thankfully.

The Serb then works Carlos Alcaraz wide before sending a forehand winner into the empty court.

A massive hold for the 24-time Grand Slam winner.

Novak Djokovic saves the first break point as Carlos Alcaraz mistimes a forehand and then a serve and volley rescues the second.

Deuce.