Another two huge serves and that's that. Done in 32 minutes. Easy peasy lemon squeazy, as they say.

Konta's serve is such a big weapon. That and a forehand winner on the line get her to a quick 30-0 lead.

Two points from closing out this set.

Jonathan Jurejko
BBC Sport at Wimbledon

Then an older, grey-haired admirer turns up.

Jose Mourinho.

Turning into quite the fanboy is the former Chelsea manager...

You may remember Mou was also at Queen's watching Murray train, with the Scot then revealing a memorable meeting between the pair in his BBC Sport column afterwards.

"Andy! Good luck!" says a thumb-waving Mou before wandering off somewhere. Perhaps the Pimms tent.

Image source, BBC Sport

Konta catches the ball the wrong way and fires a bullet into the crowd. Fair play, the boy it went towards caught it. Good effort.

The Brit sends a backhand into the net and Siniakova holds again. Konta will serve for the set next.

The cheers for Jay Clarke winning a point on the Roger Federer serve are so loud you'd have though he'd won the set.

Federer responds by not dropping another on his way to the hold.

Annabel Croft
Former British number one on BBC Two

Johanna looks very comfortable and backs herself every time she walks out on court.

When you look at the players she has beaten who are current or recent Grand Slam winners and she has pretty much beaten all of them.

Konta hops out of her seat and jogs to the baseline after the change of ends. She's ready to wrap this set up.

Siniakova looks slightly more nervous as she accidentally drops a ball and has to chase it across the court before serving.

If it weren't for the perfectly manicured grass, the players all in white and the well-dressed British crowd munching on strawberries, you wouldn't know Konta was playing at Wimbledon.

She looks so composed as she serves an ace to hold to 15. She's one game away from winning the first set.

Image source, PA Media

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Another big hold for Jay Clarke. He takes the second seed on at the net and comes out triumphant. Much better second set for the 20-year-old.

That Jay Clarke serve is a real scorcher. Roger Federer gets a handle on it, though, and then sign, seals and delivers a trademark forehand winner that just drops into the postage stamp spot in the top corner.

40-30.

Jonathan Jurejko
BBC Sport at Wimbledon

Andy Murray is idolised by teenagers all over the world - and two rather famous youngsters watch him from either side of his practice court.

Romeo Beckham - the 16-year-old son of David and Victoria, of course - arrives on one side to watch the Scot, before Coco Gauff appears shortly after to train on the next court.

The 15-year old American rather shyly edges around the perimeter of the court so as not to disturb Murray and his partner Pierre-Hugues Herbert.

Or perhaps she was bashfully trying to avoid the cameras which swiftly focused on her.

Image source, BBC Sport

Women's fourth seed Kiki Bertens is going to need something special to get out of this one. She is a set and a break down against American Taylor Townsend.

The winner of this one will meet Barbora Strycova after the Czech Republic player knocked out Germany's Laura Siegemund 6-3 7-5.

You can watch the Bertens v Townsend match here.

You have to feel for Siniakova a bit, here. Konta is playing brilliant tennis and isn't giving the Czech 23-year-old much of a chance.

Siniakova doesn't help herself with a double fault, but responds well with a solid serve to hold.

Inches. Almost a great reverse to wrong-foot the Swiss great but Jay Clarke tanks the backhand into the tramlines and tells the umpire he won't be challenging. Federer takes another quick hold.

Andrew Castle
BBC Sport tennis commentator at Wimbledon

Jay Clarke has definitely settled in now. His feet are going.

Well, Jay Clarke has found his feet somewhat. He screams his way to 40-0 before another double fault - his fourth of the match.

No bother, the 20-year-old dusts himself down and rasps another off the strings of Federer and into the gutter to hold.

Image source, AFP

Jose Mourinho is watching on as his compatriot Joao Sousa has just taken a two-set advantage and that means 13th seed Marin Cilic, who lost in the 2017 final, is in a lot of trouble.

Mourinho is loving his summer of sport as he was also spotted at the Women's World Cup quarter-final between France and the United States and a week before that was also at Queen's as well. Before that it was the Monaco Grand Prix as well. Enjoying his time out of a job!

Siniakova has called her trainer, but looks to be moving ok thankfully. That won't help her make in-roads in Konta's service game, though, as the Brit serves an ace to hold.