Get Involvedpublished at 11:41 Greenwich Mean Time 26 January
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Zverev reminds me of Tomas Berdych - the nearly man.
Sho Rahman
Men's final at Australian Open on final day
Jannik Sinner beats Alexander Zverev in straight sets to defend title
Defending champion Sinner wins 6-3 7-6 (7-4) 6-3 against second seed Zverev
It is a third Grand Slam title for world number one Sinner
Zverev becomes sixth man in Open era to lose his first three major finals
Use audio icon to listen to BBC Radio 5 commentary from Melbourne, Australia (UK only)
Emily Salley, Harry Poole and Millie Sian
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Zverev reminds me of Tomas Berdych - the nearly man.
Sho Rahman
Jonathan Jurejko
BBC Sport in Melbourne
Zverev was resigned to losing from the end of the first set, in my opinion.
He slumps onto his seat looking forlorn. Then he hunches forward and covers his face with a towel.
Still the best player yet to win a major. Nobody wants that moniker.
Sinner the winner.
Sinner 6-3 7-6 (7-4) 6-3 Zverev
It definitely wasn't the best of Grand Slam finals, but it was a clinical performance from Jannik Sinner.
It never really looked in doubt for the world number one, who didn't offer up a single break point to Alexander Zverev.
Jonathan Jurejko
BBC Sport in Melbourne
The only way which Jannik Sinner was going to seal this win.
Cool, calm and completely collected.
The match point was a microcosm of the final, really - Sinner retaining clarity of mind to execute when it really mattered.
Even the celebration is ice cold.
Sinner 6-3 7-6 (7-4) 6-3 Zverev
Three Grand Slam finals played by Alexander Zverev. Three Grand Slam finals lost by Alexander Zverev.
The world number two trudges to his chair and holds his head in his hands as Jannik Sinner celebrates.
Sinner 6-3 7-6 (7-4) 6-3 Zverev
Three Grand Slam finals played by Jannik Sinner. Three Grand Slam finals won by Jannik Sinner.
The world number one is straight over to his coaching team to give them all a big hug with a huge smile on his face.
Sinner 6-3 7-6 (7-4) 6-3 Zverev
JANNIK SINNER HAS DONE IT!!!
The Italian holds his hands aloft as he defends his Australian Open crown.
*Sinner 6-3 7-6 (7-4) 5-3 Zverev
Pat Cash
Former Wimbledon champion on BBC Radio 5 Live and BBC Sounds
This match has just been a situation where Alexander Zverev has had very few chances.
But, when he has had chances, he hasn't gone for them at all!
He hasn't even remotely looked like he was going to take them.
*Sinner 6-3 7-6 (7-4) 5-3 Zverev
The world number one misses his first serve...
*Sinner 6-3 7-6 (7-4) 5-3 Zverev
Alexander Zverev plants a forehand wide and it's time...
Championship point for Jannik Sinner.
*Sinner 6-3 7-6 (7-4) 5-3 Zverev
This time it's Alexander Zverev who comes out on top of the baseline exhange, with Jannik Sinner going long on the forehand. 30-30.
*Sinner 6-3 7-6 (7-4) 5-3 Zverev
Boom! Nothing Alexander Zverev can do about that as Jannik Sinner sends an ace straight down the middle. 30-15.
He's two points away from defending his title.
*Sinner 6-3 7-6 (7-4) 5-3 Zverev
Some nerves perhaps? Jannik Sinner looks like he's tightened up and he sends that forehand long.
Or maybe not. The world number one lashes a winner down the line. 15-15.
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Laughable that Zverev is world number two. The standard of tennis has massively dropped off the past few years.
Paul Christie
*Sinner 6-3 7-6 (7-4) 5-3 Zverev
Another miss from Jannik Sinner, but he follows that up with a sizzling forehand strike that is way out of Alexander Zverev's reach.
But there's the hold and it's up to Sinner to serve out the Championship.
Sinner 6-3 7-6 (7-4) 5-2 Zverev*
Alexander Zverev has got to hold serve here or else it's all over.
So far so good as two misses from Jannik Sinner hand him a 30-0 lead.
Sinner 6-3 7-6 (7-4) 5-2 Zverev*
Pat Cash
Former Wimbledon champion on BBC Radio 5 Live and BBC Sounds
I guess Alexander Zverev is just so frustrated. He is almost saying to himself: 'Where has that been?'
He has just thrown a couple of great points in there, but he has just had a few shockers tonight.
He must be so frustrated by it, thinking: 'What is happening? I know I can do these shots.' In normal conditions, he literally does them all day! He is able to run a player around and smack a winner.
Sinner 6-3 7-6 (7-4) 5-2 Zverev*
The serve comes up clutch for Jannik Sinner and the defending champion gets the hold across the line to move closer to the title.
One. Game. Away.
*Sinner 6-3 7-6 (7-4) 4-2 Zverev
Jannik Sinner blast his serve down the middle, catching Alexander Zverev unaware before firing long. Back to deuce.