Opportunity missed. Jannik Sinner's first serve rocks up on a big point and draws the forehand error.

Deuce.

Jannik Sinner's first serve is having a little holiday and it's giving Novak Djokovic a nice foothold in points, allowing him to get inside the baseline and set up a volley winner with yet another drop shot.

Trailing 15-30, Sinner finds a timely ace to level the game but then produces a poor drop shot allows Djokovic to pounce.

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A quick hold to love for Novak Djokovic, drawing a run of forehand return errors from Jannik Sinner.

After his iffy start, the Serb has now gone four consecutive service games without offering up a break point.

Russell Fuller
BBC tennis correspondent on BBC Radio 5 Sports Extra

Perhaps the most sobering moment for Djokovic [against Sinner] was two years ago at the Australian Open.

He was on a 33-match winning streak at the Australian Open and he lost the first two sets 6-1 6-2. He won the third set, but he was completely outplayed.

That felt like quite a significant moment.

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Novak Djokovic profits from a backhand error from Jannik Sinner to take a 0-15 lead. He's grumbling to himself after the point. No idea why...

Later in the game, there's a full-throated roar as he misses a forehand.

At the other end of the court, Sinner is expressionless as he holds to 15.

Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra

Djokovic has come out firing in this set, he's realised he needs to pump it up a bit, hit a bit harder.

He needs to get Sinner off balance. It's not very easy to do, but he has to push him around somehow.

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Jannik Sinner is quite rapid around the court. He hunts down a sliced backhand from Novak Djokovic, his feet a blur of yellow as he approaches the net, and places a backhand winner into the corner of the court: 0-15.

Djokovic wins the next three points, getting the crowd on their feet with a backhand drop shot followed by a sliding forehand to rescue a point.

The cheers become groans as he nets a backhand but he completes the hold to 30.

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Jannik Sinner has had Novak Djokovic like a puppet on a string in these past few baseline rallies, dragging him from corner to corner. He opens up the court and seals the first set with a down the line backhand.

Lovely tennis from the Italian.

Ace. Sliced smash winner after stretching Novak Djokovic back and forth across the baseline. Unreturned serve.

Three set points for Jannik Sinner.

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

I don't think Djokovic feels that anywhere is safe to go to on this court. He feels that every shot is going to come back. It's like playing against a video game character.

There was some interesting looks from Djokovic over to his camp, a little bit of anger. I'm not quite sure what he said, but he didn't look particularly happy

It's Novak Djokovic's turn to chase down drop shots en route to a routine hold, firing his return back into Jannik Sinner's feet.

He's growing into this.

Sinner will serve for the first set.

Good awareness from Jannik Sinner, rushing from the back of the court following an unhelpful net cord and nailing a backhand winner.

He uses his speed again on the following point, chasing down a drop shot and opening his racquet to fire a forehand winner across the net at a vicious angle: 40-0.

A serve down the T completes the hold. He's only dropped five points on serve.

Novak Djokovic pushes Jannik Sinner into his backhand corner and is quickly into the net for the forehand winner with the Italian running the wrong way across the baseline.

But what's looking like a routine hold at 40-0 quickly turns sticky as Sinner wins the next two points.

Djokovic completes the hold courtesy of a loose forehand from Sinner.

Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra

Djokovic had a shocker in the first few games, but he is striking the ball pretty well now and is hitting really deep.

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Jannik Sinner has had his serve tested and come through with flying colours, securing the hold with ace number five.

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Novak Djokovic throws back his head after failing to capitalise on a second serve.

Deuce.

Jannik Sinner's fourth ace is followed by Novak Djokovic's fifth forehand unforced error: 30-0.

Djokovic comes into the net and gets in some smashing practice, needing two bites at the cherry to see off the point and level the scores.

After manipulating Sinner across the baseline and pegging him back with repeated deep returns, the Serb earns a break point with a trademark down the line forehand.

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At the second attempt, Novak Djokovic closes out the hold. The 10-time champion is on the board.

Novak Djokovic forces a backhand error from Jannik Sinner to earn game point but the Italian's eyes light up at a slow and floatly second serve and he hammers a forehand winner down the line. 40-all.