Johanna Konta speaking on BBC One: "Right now it is surreal because of how quickly things change in tennis. I'm definitely still digesting things.

"I definitely felt clear on what I was trying to achieve, regardless of if it was going my way. I just stuck to my true self. I knew against Simona she wasn’t going to give me much for free and I had to create my own chances and I took a few of them.

"I felt consistent in my approach and in my general being out there. I continued to trust in myself."

Without sounding sycophantic, Konta had a lot of expectation on her shoulders.

Not just the tag of 'Wimbledon favourite' but playing on Centre Court, in front of a crowd expecting big things, and facing a player who knew she was just one win away from the world number one title is a big ask of one player.

To fight back from a set down, to match the intensity and power shown by the wonderful Simona Halep, is some feat.

Bravo.

Andrew Jolly: Nerves of steel. Konta is a special player. She's into the semis.

Stephanie Siu: Wonderful Jo! You've made the nation so happy!

YSL: Not the best way for that point to end.. But what a brilliant match!

John McEnroe
Three-time Wimbledon singles champion on BBC TV

That was an amazing quarter-final match. A bizarre last shot, someone did yell out unfortunately and it's too bad it ended that way. Obviously there's a standing ovation for both.

Halep waits for Konta and the two leave the court together.

What a brilliant, brilliant performance.

Leon Smith
Great Britain Davis Cup captain on Radio 5 live

Well done Jo Konta! You thoroughly deserve this. It's a strange ending to the match. All credit to Konta.

Konta, on the right of the baseline, whips her arm up and the forehand is stunning!

Two match points to Konta!

Image source, Getty Images

Konta loops a forehand long before Halep responds in kind to keep it equal.

An almighty rally, both players on the stretch, but it's Konta who gets it to 30-15 with another backhand winner into the corner of the court!

I feel like a bag of nerves just watching. Even Virginia Wade looks tense as she watches on.

And yet these two players look so composed. Heads down. Eyes forward. Not a flicker of emotion as the crowd applauds and cheers.

Here. We. Go.

Jonathan Hextall: I can't bear this! Are we all on edge!!?? One game away

Smiffy: This next service game will be a real test of nerve for Jo.

Image source, PA

Halep is going to make Konta wait

A series of lovely speedy serves, followed with a crash down the line, and Halep holds to love.

Konta will serve for the match.

Chris Bradnam
BBC Sport commentator

That's a wonderful message back to Halep. A love hold. Jo's a game away from the semi-final.

Barbara Schett
Former world number seven on BBC Radio 5 live

She's as cool as a cucumber out there isn't she?

Image source, PA

Lovely from Konta, responding to a bit of a shank return from Halep with a dart to the net and a bit of fakery, moving to Halep's right as she slaps the ball to the left.

Big serve, Halep returns into the net - and a forehand winner gets Konta a hold to love! She's a game away from a place in the Wimbledon semi-final!

Kim Clijsters
Former world number one on BBC TV

You can feel Halep's doubt a little bit. When Johanna went up 4-2, the shots were getting a little shorter and her body language is a little bit off.

The rain falls, still the crowd on Johanna Montagne remains. Transfixed.

Image source, PA

Here's what to look out for on men's quarter-final day.

Centre Court (13:00 BST start)

• Andy Murray v Sam Querrey
• Milos Raonic v Roger Federer

Court One (13:00 BST start)

• Gilles Muller v Marin Cilic
• Tomas Berdych v Novak Djokovic

Halep's response?

A love hold. She's not out of this yet.

Image source, EPA