Wang Xinyu gets herself on the board in this third set as she holds to 30.

There were moments for Harriet Dart but this time Wang was able to provide the answers to the questions posed by the Brit.

A sloppy backhand from Norrie goes long and Zverev has a sixth match point.

Tim Henman
Former British number one on BBC TV

Zverev is definitely more aggressive from the back of the court when he is behind in the count

A fifth set point for Norrie.

Zverev is long on first serve.

But he gets it done on second, meeting a soft Norrie return to volley at the net.

Johanna Konta
Former British number one on BBC TV

It's been so good to see Harriet Dart's response in this third set so far.

She has got braver as the set has gone on and now it makes Wang Xinyu's job more difficult.

Zverev saves it.

This tie-break has gone on for 21 minutes already - that's the tie-break alone.

For context, Jannik Sinner took just 21 minutes to wrap up the first set in his victory against Miomir Kecmanovic last night!

Image source, Getty Images

Fantastic from Harriet Dart to consolidate the break.

She crushes a forehand down the line, just grazing the paint, to go up 40-15.

Wang Xinyu is then unable to return a strong serve out wide and Dart is in control of the third set.

Those watching on Centre Court are getting their money's worth here.

Oh my. Another tense rally with Norrie looking to hold and it ends with Zverev scooping into the net as he's unable to read Norrie's drop shot.

A fourth set point for Norrie.

A roar of delight from Harriet Dart as Wang Xinyu goes long and the Brit earns the break.

The perfect start to the deciding set for Dart but she'll know that Wang is going to come out swinging in the next game.

Image source, Getty Images

Tim Henman
Former British number one on BBC TV

When do we need to start researching the longest tie-break at Wimbledon?

Emphatic from Zverev who steps up to the net to meet Norrie's soft return and it's slammed into the corner at the baseline.

The German has a fourth match point.

The longest rally of the match as Norrie goes looking for a set winning break.

But it ends frustratingly for Norrie who finds the net.

Andy Murray's mother Judy, in response to a post on X from television presenter Marcus Buckland describing Emma Raducanu's decision to withdraw from the mixed doubles as "astonishing", wrote: "Yes, astonishing."

Harriet Dart marches out strongly for the start of the third set, holding to 15 to get us under way.

She looks determined to get this wrapped up as quickly as possible.

Norrie defends a third match point. He's refusing to give in.

A thunderous forehand puts him back in front with another shot at set point.

We've not had a break of serve in this tie-break since the ninth point!

Tim Henman
Former British number one on BBC TV

To be honest that is a couple of poor mistakes from Zverev.

Can Norrie take advantage?

Tim Henman
Former British number one on BBC TV

Relentless serving from Zverev

Johanna Konta
Former British number one on BBC TV

Harriet Dart is visibly frustrated.

Wang Xinyu has had success moving up the court and it was a really brave shot to play.

Her confidence has gone up and she is hitting more winners, she has raised her level.

Dart has got to remember the good things she has done up to this point.

This is as back-and-forth as it gets.

Norrie has a second set point but he's got to try and overcome this Zverev serve.

A solid enough return but Zverev is just too good.