It's the Pegula slice that does the damage in the fifth game of the opening set.

Lesia Tsurenko got into that game a bit more than the others but it's still pretty one-sided stuff in favour of the world number four.

Can the Ukrainian hold serve to avoid the shut-out?

Jess Anderson
BBC Sport at Wimbledon

There it is!

The crucial breakthrough finally came for Murray and Venus in the eighth game of the deciding set and was executed in emphatic style with a break to love.

Huge celebrations from the duo who had to bide their time to get there.

They're into the third round.

Murray stopped to take a couple of selfies and signed some tennis balls on his way out. He'll be back again this afternoon in the mixed doubles with American partner Taylor Townsend.

And there it is, big return from the Ukrainian's serve from Pegula and she's up a double break.

Will we have a bagel on Court One to accompany all that bubbly?

Jess Pegula will be popping some champagne corks pretty soon the way this first set is going.

Two more break points on the Tsurenko serve for a double break...

Sonia Oxley
BBC Sport at Wimbledon

What's noticeable about this time of day on the court is the number of corks popping as people settle in for the afternoon with a little bit of fizz.

It's quite an art to time the opening of the bottles though - you don't want to disrupt a point with a loud pop - and even worse if the liquid starts fizzing all over the place while you're pouring - so really you need to do it at the changeover.

I remember sitting next to one woman once who missed the chance and had to sit with her hand desperately pushing down on the cork to stop it exploding during silence ... and typically, it was a very long rally.

This time it's Lesia Tsurenko's turn to lose a challenge - but in her defence, it was by the narrowest of margins, as close to the white line as it could have been without touching it.

However, Jess Pegula struggles to cope with a pair of returns from the Ukrainian, putting both into the net to bring up break-back point.

Tsurenko, though, can't capitalise, putting a forehand wide and Pegula produces a couple of good first serves to hold.

Johanna Konta
Former British number one on BBC TV

She's definitely been doing a good job of taking time away from Tsurenko who likes a little more time on the ball but it is hard to get on the grass, and especially from a ball like Pegula's.

Lesia Tsurenko sends a lob long on the stretch and after a brilliant backhand return down the line, Jessica Pegula has two break points early doors.

And the fourth seed takes the first one of them, showing excellent technique to dispatch a volley while backpedalling from the net.

Image source, EPA

Sonia Oxley
BBC Sport at Wimbledon

That was quite early for a challenge in a match - Jessica Pegula wanted a video replay of the very first point ... you've got to wonder whether that's just to settle the nerves and gather composure after it looked like she made the wrong decision to leave a shot from Tsurenko. Hawk-Eye showed the call was correct. She now only has two challenges remaining in this set, which could be costly further down the line.

Jessica Pegula wastes a challenge on the very first point of the match as a mis-hit Tsurenko return is proven to have clipped the sideline by the TV replays.

But she quickly recovers to hold to 30 thanks to a couple of unreturnable serves.

Sonia Oxley
BBC Sport at Wimbledon

Jessica Pegula and Lesia Tsurenko have just walked out on to Court One to a rousing reception. It seemed like the crowd were cheering more for the Ukrainian but it was hard to tell.

Two minutes until we start, people are still making their way into the court grabbing a few snacks and drinks on the way in ready to settle into what promises to be an interesting match-up.

Image source, BBC Sport

Watch Marketa Vondrousova's "incredible point" against Marie Bouzkova in the women's singles fourth-round at Wimbledon.

It's on serve with Bouzkova leading 3-2 in the final set.

Only six women have reached the Wimbledon quarter-finals after turning 34 years old.

Chris Evert, Billie Jean King, Martina Navratilova, Serena Williams, Venus Williams and, last year, Tatjana Maria.

Not bad company for Lesia Tsurenko to be in should she achieve that feat today.

All smiles.

The reigning men's singles champion Novak Djokovic is back on the grounds as he begins his preparations for a Centre Court tussle with 17th seed Hubert Hurkacz.

Image source, PA Media

Michael Emons
BBC Sport at Wimbledon

Image source, BBC Sport

It is day seven and 34 players remain in the singles competitions - 17 in the men's and 17 in the women's.

It should be 16 in each by today, but rain last night meant the third-round matches of Grigor Dimitrov v Frances Tiafoe and Anastasia Potapova v Mirra Andreeva have still not been finished.

What is striking is the number of countries still represented with the 34 players coming from 18 different nations. Russia leads the way with six players left (three men, three women), followed by the Czech Republic (one man, three women) and the United States (two men, two women) on four apiece.

Here is the full breakdown...

• 6 - Russia
• 4 - Czech Republic, United States
• 2 - Belarus, Italy, Kazakhstan, Poland, Ukraine
• 1 - Brazil, Bulgaria, Canada, Colombia, Denmark, Greece, Serbia, Spain, Switzerland, Tunisia.

But sadly for home fans, Katie Boulter's loss to Elena Rybakina yesterday means it is a watching brief for the Brits now, with no Britons making it through to week two in the singles.

Image source, Getty Images

At 34, Jess Pegula's last-16 opponent Lesia Tsurenko is the oldest player remaining in the women's singles at Wimbledon this year.

The Ukrainian won the pair's only previous meeting over three sets at Indian Wells but that was more than four years ago.

This is her 11th appearance at SW19 - and it's the first time she has reached the fourth round, having come through a marathon champions' tie-break 20-18 against Ana Bogdan on Friday.

That was the longest women's singles tie-break in Grand Slam history and Tsurenko saved five match points before progressing.

Nearly time for action on the show courts and world number four Jess Pegula is hoping to achieve a personal milestone today - Wimbledon is the only Grand Slam where she is yet to reach the quarter-finals.

She came through a deciding set against fellow American Lauren Davis in round one before more straightforward wins over Spain's Cristina Bucsa and Italy's Elisabetta Cocciaretto.

Pegula, whose parents own NFL team the Buffalo Bills, has the fourth most match wins on the WTA Tour this year behind only Iga Swiatek, Aryna Sabalenka and Elena Rybakina.

Image source, Getty Images