Is this match slipping away from Harriet Dart?

Wang Xinyu does enough to hold and Dart must now do the same to extend the match any further.

Johanna Konta
Former British number one on BBC TV

Harriet Dart has to not lose focus on the good things that she has been doing.

When you get emotionally heightened, you lose your way a little bit.

Not this time for Harriet Dart.

She tries to whip a forehand down the line but it drifts just wide. Deuce.

Wang Xinyu sends a forehand wide and Harriet Dart has the chance to break back.

More from Alexander Zverev, on working on the weaknesses in his game:

"The serve was the shot that lost me the US Open final and lost me a few other Grand Slams. It was the shot I worked the most on, with my forehand as well.

"I’m happy it’s working the way it is. I have spent hours, I’m a tall guy, it should be my strength but it was always my weakness.

"If it’s working the way it is, if I continue serving like that then we’ll see how the tournament goes."

Image source, Getty Images

No signs of struggle from Swiatek on serve.

Putintseva lobs it long and trails 40-0.

Swiatek holds to 15 with Putintseva unable to get behind a deep forehand.

Four games in a row for Wang Xinyu - an impressive turnaround from the world number 42.

Harriet Dart is getting increasingly frustrated but much of this change in momentum is to do with improvements from Wang rather than any drop off from Dart.

Wang is getting after Dart's second serve and to great effect.

Can the Brit recover and turn this around? The crowd on court two are certainly try to help her now.

Let's hear from Alexander Zverev, who makes it into the fourth round for the third time:

On taking on a British player on Centre Court:

"Cam is an incredible player. Obviously grass is going to be his favourite surface as a Wimbledon semi-finalist here. I knew I had to play at my best level. I’m extremely happy with my performance, extremely happy with my game. It’s an honour to play on Centre Court, I’ve played on all the centre courts around the world but I think Wimbledon is still something more special and something different.

"For me and for all tennis players it’s an honour to play on this beautiful Centre Court and in front to the Royal Box, we had so many sporting legends today. For me Pep Guardiola – when I saw Pep I got so nervous for a few games.

"Thanks a lot for coming, it’s a privilege to play. Last thing – Bayern Munich needs a coach. If you’re tired of football you can coach me on a tennis court any time."

On his knee:

"I do feel like a cow on ice sometimes. It is what it is but I managed. I do feel restricted on some of the movements but I will check and see what it is but I’m pleased I was able to play the way that I did. If I’d dropped in my level I would have had no chance against Cam."

Image source, Getty Images

Swiatek really is struggling to judge the bounce of the ball at the baseline. There's a bit of bobbly ground after a week of play on Court One.

Putintseva holds. But how much did that service game take out of her?

Johanna Konta
Former British number one on BBC TV

Harriet Dart needs to knuckle down on what she can do to counter the fact that Wang Xinyu has started to play better.

She engages a lot on the emotional side and that can take a lot of energy out of you and redirect your attention to something that is not the most helpful out there.

A good recovery from Putintseva to regain control of this service game. Advantage.

A sign of nerves though? The Kazakh double faults and we're back to deuce.

Putintseva, from the baseline, overcooks her return and Swiatek has break point.

Image source, Reuters

Just like that we're all square in the decider.

Harriet Dart got it to 0-30 and then deuce but Wang Xinyu comes through.

Dart is providing her own analysis at times now. "Too short," she says to herself just after a backhand sat up nicely for Wang to power past her for a winner.

Swiatek puts the pressure on straight away and a powerful forehand opens up a 40-15 lead and two break points.

The Pole is long on the first attempt and then a dodgy bounce prevents her from returning cleanly second time round. Deuce.

Swiatek rattles off three points in a row on serve to get us going on Court One.

The number one seed wraps up to 15 with a forehand.

Johanna Konta
Former British number one on BBC TV

Harriet Dart needs to remind herself that she has the lead and she is playing really solid return games.

I don't think she has too much to worry about out there but she is probably feeling that she has let her opponent Wang Xinyu back in.

Image source, Getty Images

World number one Iga Swiatek has breezed through the first two rounds as she goes in search of a first Wimbledon title.

Not only has the 23-year-old Pole not dropped a set, she has only been broken once and didn't even face a break point in round two.

Swiatek has never gone past the quarter-finals at SW19 but in this form, the five-time major winner is going to take some stopping.

It is the job of world number 35 Yulia Putintseva to try today on Court One.

The Kazakh, 29, is into the third round for the first time but claimed notable wins to make it this far.

She beat former doubles champion Katerina Siniakova of the Czech Republic in three sets in round two having won in straight sets against 2018 Wimbledon champion - and three-time major winner - Angelique Kerber in the first round.

Image source, Getty Images

To say Iga Swiatek is on a good run would be an understatement.

The top seed has now won 21 matches in a row to claim titles in Madrid and Rome, as well as becoming French Open champion for the fourth time.

Her record on grass has been quite so impressive but after making the quarter-finals last year, with such momentum behind her, could this be Swiatek's year at the All England Club?

It took four bites of the cherry but Wang Xinyu gets the break eventually.

The Chinese right-hander goes after another Harriet Dart second serve and the Brit can only put it limply into the net.

We're back on serve in the third set.

Oh dear.

Harriet Dart plays a near-perfect point at 15-30, advances towards the net, waits to see which way Wang Xinyu is going and hits the other way... but overcooks the backhand.

Two break points but Dart digs in and saves both. Then comes a third and Dart produces a rare - and very timely - ace.

Another big serve gives her the chance to secure the hold but, with the court at her mercy, she lashes the ball into the net.

Deuce.

That was mentally and physically draining to watch, never mind being one of the two players on court.

Norrie defended five match points before Zverev sealed his spot in the last 16 at the sixth attempt.

The German fourth seed will play either American 13th seed Taylor Fritz or Alejandro Tabilo of Chile next.