Both players look pretty settled in a backhand exchange before Novak Djokovic sends a routine groundstroke long.

Three break points. Three set points.

Jannik Sinner draws first blood, pummelling a forehand return into an onrushing Novak Djokovic. 0-15.

Djokovic sends a forehand long. 0-30. Huge moment.

Jannik Sinner completes back-to-back holds to love with an ace.

Novak Djokovic, who's looking a little weary, will have to serve to stay in the set. His shoulders are down.

Novak Djokovic holds to 30.

The third set remains on serve. There's only been one break point - courtesy of a Jannik Sinner double fault at 30-all in the fifth game - but Djokovic couldn't convert.

Forehand smash, ace, forehand smash, ace. Jannik Sinner holds to love.

Poor again from Jannik Sinner. He drags a cross-court backhand into the tramlines with the court gaping and later nets a simple forehand.

Novak Djokovic gifts the Italian a point at 40-0 and starts gesturing again, but he holds to 15.

What a match we witnessed this morning at the Australian Open.

Carlos Alcaraz secured his first Australian Open final after battling back from the brink amid serious physical issues to defeat Alexander Zverev in a dramatic five-set epic.

The Spaniard won 6-4 7-6 (7-5) 6-7 (3-7) 6-7 (4-7) 7-5 after an enthralling five hours and 27 minutes in Melbourne.

Here's how he sealed victory.

Image source, Getty Images

Back-to-back forehand winners secure the hold for Jannik Sinner.

At the change of ends, Novak Djokovic slumps into his chair and covers his face with his towel.

Saved! A huge first serve puts Jannik Sinner on the front foot and he follows up a sliced drop shot with a pinpoint backhand pass.

An animated (by his standards) fist pump from the Italian.

Image source, Getty Images

Not one for the highlights reel. Jannik Sinner, flat-footed and face-on on the baseline, goes for the forehand drop shot and the ball flops into the net.

Three points later, he drags a backhand in the tramlines: 30-all.

And then, a double fault. That's two in two games from the Italian.

We wait to see who will strike first in set three.

That's an opening, though! Novak Djokovic completely misjudges a Jannik Sinner backhand, taking the decision to leave it but having to watch as it lands perfectly on the line.

High-pressure moments for Djokovic, but he deals with it superbly with a flying cross-court forehand. He briefly pauses for breath with his hands on his knees but returns to business and holds.

Annabel Croft
Former British number one on BBC Radio 5 Sports Extra

Compared to the first set, Djokovic is way more in control in some of these rallies.

His court positioning is better, he is getting Sinner across the court more and he looks less stressed in the rallies.

Image source, Reuters

Jannik Sinner opens with a double fault - his first of the match. He later sends a backhand long for 30-all.

Mistakes are creeping into his game but he keeps his cool to secure the hold, nailing a cross-court backhand winner after chasing down a drop shot before Novak Djokovic sends a forehand into the net.

Image source, Getty Images

Sections of the crowd have been quite rowdy throughout this match and there's some equally enthusiastic shushing from other parts at 30-0.

Novak Djokovic holds to 15 with an ace.

Gigi Salmon
BBC Sport tennis commentator on BBC Radio 5 Sports Extra and BBC Sounds

No-one has got more Grand Slam wins after losing the first set than Djokovic, with 55.

Ridiculous numbers.

Image source, Getty Images

Novak Djokovic went for a comfort break at the end of the second set. Jannik Sinner - still emotionless - spent his time bobbing around the baseline and gets some words of wisdom from his box.

The advice/encouragement does the trick. The Italian opens the third set with a hold to love, finding four first serves - including an ace - and finishing the game with a backhand winner.

Annabel Croft
Former British number one on BBC Radio 5 Sports Extra

A very big change of tactics from Djokovic. It was very clear that he was going to inject extra pace and power, stopping Sinner from controlling all of the rallies.

At the start I thought this was going to be an impressive, straight sets victory for Sinner. Djokovic, with his experience, has changed the rhythm of the match.

Russell Fuller
BBC tennis correspondent on BBC Radio 5 Sports Extra

What a great set of tennis from Djokovic!

He has ended a run of 10 consecutive sets won by Sinner in their meetings, and after a walkover and retirement in his previous matches, it is his first set won at the Australian Open since Saturday.

Novak Djokovic was relentless behind his first serve in the second set, winning 19 points from 22.

Jannik Sinner had four break points but failed to convert any of them.