Cameron Norrie secures the mini-break before consolidating it with a big first serve.

Norrie's raising his game at just the right time here as some deep hitting sees the Briton go into the change-of-ends with a 5-1 lead.

The unforced error count is starting to creep back up for Jannik Sinner - his sixth of this third set hands Miomir Kecmanovic a route back in at 30-15.

But that's as good as it gets for the Serbian as Sinner settles back into a rhythm for the hold.

We have a hold of serve!

Jelena Ostapenko keeps her nerve this time.

She has a slip at the back of the court on the final point, but she is fine and watches Harriet Dart's shot down the line land wide.

Image source, Getty Images

Tim Henman
Former British number one on BBC One

I know it is only the third game of the set, but it felt like that was a big moment. Jannik Sinner was looking to maintain the momentum.

He found the first of the three drop shots mildly amusing, but that one at 1-1 30-30 against the number one player in the world was pretty shocking.

Michael Zheng is still looking good on serve as Cameron Norrie is unable to shake the American off his game.

Zheng holds as Norrie puts a backhand into the net and we're going to a second tie-break of the match.

Image source, Getty Images

Tim Henman
Former British number one on BBC One

It is so frustrating when you think this time last year Jack Draper was playing the best tennis of his life.

He was top five in the world, he had beaten Carlos Alcaraz to win Indian Wells, he had been in the Madrid Open final on the clay, and he got to the fourth round of the French Open.

He was coming into this grass-court season with his own high hopes and also the hopes of a nation, but since then he has literally only played about three tournaments.

His body just hasn't been able to stand up.

Jannik Sinner digs deep to defend at the baseline but his return loops up and Miomir Kecmanovic comes around the net post to hit the winner for 30-15.

Sinner strikes back for 30-30 but another poorly executed drop shot - that's three in a row - puts Kecmanovic within a point of holding.

Kecmanovic makes a meal of getting over the line with a let and a fault but eventually gets there on second serve when Sinner's forehand is long.

Anybody else getting a feeling of de-ja-vu here?

Okay, it wasn't a double fault this time, but after giving herself some encouragement, Jelena Ostapenko manages to get the break back again from Harriet Dart.

Let's see what the Latvian can do on her own serve this time.

Now Cameron Norrie finds a consistent home for his first serve as the Briton holds to love.

Michael Zheng will serve to stay in the set again - can Norrie apply some pressure this time?

Jannik Sinner has also come out with his tail up and confidence high too.

Sinner races into a 40-0 lead and, with the game firmly under control, attempts a pretty audacious drop shot. It lands short and doesn't come off.

But Sinner wraps up the hold at the next attempt.

Image source, Getty Images

Cameron Norrie can't do much about that as some strong first serving from Michael Zheng sees the American hold.

Naomi Broady
Former British player on BBC Radio 5 Live

It's a tough one because if you keep poking at the injury - it's always good to imagine a scab, if you keep picking at a scab it's just going to continue to scab over.

It's so tough to allow it time to heal and build that load up slowly when you do return and I think that's where most of the damage is re-done when you come back too quickly.

But we say how relentless our sport is.

It's so frustrating for him, and Emma Raducanu as well.

Does anyone want to serve in this match?

That is now three breaks in a row and all have come with a double fault.

Harriet Dart will happily take it I'm sure, and see if she can now be the first to hold serve in this decider.

We've seen momentum shift from one side of the court to the other across the opening two sets, will Miomir Kecmanovic wrestle back control in this third?

It's a positive start from the Serbian on serve as he holds to love.

We've just had the news that Jack Draper has pulled out of his first-round meeting with American Taylor Fritz due to a recurrence of an arm injury.

His exit comes less than 24 hours after Emma Raducanu withdrew from the women's singles due to a stress fracture in her right leg.

Fellow Brits Felix Gill and Max Basing have already bowed out of the men's singles in the first round, losing in straight sets to Rafael Jodar and Shintaro Mochizuki, respectively, while Mika Stojsavljevic lost 6-2 6-1 to Belinda Bencic in the women's singles.

Cameron Norrie is midway through the third set against Michael Zheng, with the match currently tied at one set all, while Harriet Dart has taken Jelena Ostapenko to a decider - you can follow live text commentary of both matches right here.

On court 12, Oliver Tarvet is tied at 5-all in the opening set against France's Arthur Rinderknech.

Alicia Dudeney has lost the opening set 6-3 to American Alycia Parks on court 4 in her women's singles first round tie.

You can keep across the action on all of the courts on BBC iPlayer.

Cameron Norrie roars as he comes into the net to put away a volley but Michael Zheng isn't going anywhere as another remarkable forehand is too good for the Briton.

Norrie responds with a forehand winner across court before letting out a shout of "come on", and seals an important hold as Zheng puts a lob long.

It feels like that could prove to be a pivotal game in this set.

Image source, Getty Images

Harry Poole
BBC Sport at Wimbledon

That's more like it from Jannik Sinner. Although still far from his top level, the Italian shakes his fist in the direction of his team as he skips off to his chair, having levelled the match without too much trouble.

There's still the odd double fault and surprise error disrupting his flow, but the fact that 16 of the 30 points he won in that second set were winners tells you all you need to know about his trajectory in this contest.

Few would bet against him powering on to victory once he returns to the court, but Miomir Kecmanovic has seen enough so far to know he has a chance. The crowd are getting behind both players, thrilled with the close contest that has developed.

Image source, Getty Images

Jannik Sinner made improvements across all areas during that second set.

He reduced his unforced errors from 15 to eight - still too high for his standards but a move in the right direction.

And most notably won 100% of his first serve points - all 14.

We're back under way with the third set.