Stan is not the second-set man. Just yet.

After breezing to 40-0 in a twinkle, Roger Federer drags him back into the dogfight at 40-30 and then sees a backhand from the opposite end spray wide.

Deuce.

Stan Wawrinka clumps a backhand long over the baseline to see Roger Federer purr out to 40-0.

His Royal Swissness completes his hold, by swatting away a backhand and barely breaks stride on his way to his changeover chair.

The spotlight spins round onto the Stan Wawrinka serve worryingly quickly for the the Swiss number two.

He is asked to hold up his end again after Federer whips through his own service game to 15.

But this was a bit easier for Wawrinka that his usually troubles. A hold to love.

Image source, gETTY

Stan Wawrinka is getting knee-deep in the muck on his own service, but each time he finds a way through.

This time from deuce, he finds a bit of spice that that is too much for Roger Federer.

For now, we're going to join the men's quarter-final between Roger Federer and Stan Wawrinka...

Awaiting Johanna Konta in the semi-finals will be either Croatia's Petra Martic, the 31st seed, or 19-year-old Czech Marketa Vondrousova - the pair face each other later today.

Image source, BBC Sport

Johanna Konta reaches the third Grand Slam semi-final of her career and becomes the first British woman to make the last four at the French Open since Jo Durie in 1983.

Some going, considering she'd not won a main-draw match at Roland Garros before last week...

Naomi Cavaday
BBC Radio 5 live tennis commentator at Roland Garros

I think Konta can take out Halep if she plays like that. That was phenomenal.

More from Johanna Konta, speaking to ITV: "It was a great performance. I was really pleased with the level I played. I accepted my opponent could raise her level and knew it was going to be difficult. I'm just really pleased.

"I am just so pleased with each match I've been building, not just here but in the tournaments proceeding. Overall I am really enjoying my tennis."

Daniela Hantuchova
Former world number five at Roland Garros

Simona Halep was the pick for me to win the trophy before the tournament but the way Johanna played it will be really interesting.

Russell Fuller
BBC tennis correspondent at Roland Garros

The entire performance was breathtaking. Everything about that performance was majestic. Sloane Stephens could do nothing on Konta's serve. She had the stuffing knocked out of her. That's the best I have ever seen her play.

And here is British number one Johanna Konta: "To play on this new Chatrier, to be out here and play one of the best players in the world and play at the level I did, I am really proud of myself. I am so pleased to have gone through.

"Definitely dealing with the conditions - it's super windy - and against an opponent like Sloane, who can at any moment run away with a match, I had to be prepared.

"I was pleased to keep her on the back foot and control points. I accepted playing the game and enjoyed that."

Stan Wawrinka fights his way out of the corner, saving two break-back points to keep himself ahead on the scoreboard.

Daniela Hantuchova
Former world number five at Roland Garros

What a performance! She couldn't ask for a better match and deserves every bit of her celebration. If she plays like this I don't see anyone that can stop her.

Now the British number one hits her spot. It's too hot to handle.

Two match points for Johanna Konta.

Sloane Stephens can only jab her return long from another Johanna Konta blaster - 30-0.

But then a double fault...

Jonathan Jurejko
BBC Sport at Roland Garros

"Let's finish Jo!" screams a British accent from the Chatrier crowd.

On this form it is surely a given...

Kicking, whipping ace for Johanna Konta to edge one step closer... 15-0.

Well, well, well.

This is alive-alive-o.

Stan Wawrinka whips off four points in succession to claim a break from 40-15 down. It is the first break of the match.