I'm afraid it has been a night when, to paraphrase the Spice Girls, two became none. We started with two Britons left in the US Open and have ended with neither third seed Andy Murray nor qualifier Jo Konta able to reach the quarter-finals.

So it's goodbye from him and goodbye from her.

Image source, Getty Images

But we're not leaving Flushing Meadows with them - join us later in the week for live text commentaries of the business end of the year's final Slam. In the meantime, keep tabs on all the stories from New York here. Night y'all!

Jeff Tarango
Former professional tennis player on BBC Radio 5 live sports extra

"That first set tie-breaker was the key moment. Once Anderson won and had the confidence and momentum, he was tough to stop. He never stopped serving after that. Andy Murray fought as hard as he could but his tank was empty."

David Law
BBC Radio 5 sports extra live commentator

"Andy Murray couldn't find it within himself to raise his level early on and that malaise was the question mark for me. He played well in the first set, but didn't win it, and then there was a mental capitulation in the second set."

Kevin Anderson, who beat Andy Murray to reach his first Grand Slam quarter-final: "I'm lost for words right now. It was a very tough match and I just kept my composure throughout, playing one of the best matches of my life.

"It's not easy playing Andy, he's such a fighter. I knew I had to stick with it. I served very well, that helped me in the fourth set. I wish I could play every tie-break like that.

Image source, Getty Images

"Right now I'm so excited to be through, it feels amazing. Tomorrow we'll sit down, Stan is an amazing player and I'll to come back and do it again."

Kevin Anderson is urged to "rip off your shirt or something" as way of celebration by the on-court interviewer at Flushing Meadows. The South African chuckles but thankfully doesn't oblige by mimicking the Incredible Hulk.

Next up for Kevin Anderson? French Open winner Stan Wawrinka in the last eight.

Andy Murray receives a huge round of applause as he disconsolately trudges off Armstrong. He manages a wave to the crowd, but his face cannot hide his disappointment. Kevin Anderson has the microphone thrust in his face on court, telling us it is the "best win" of his career.

All over! Kevin Anderson needs just the one match point. The South African looks delighted - and shattered - after reaching the first Grand Slam quarter-final of his career. A deserved achievement.

Image source, Reuters

"Please," asks the umpire as the crowd can't contain their emotions. A long rally ends in Murray pushing a forehand wide. Six match points for Kevin Anderson....

Kevin Anderson is strolling into the quarter-finals now. A booming ace down the T. Murray looks to be a goner.

Anderson, firmly in control, lashes a serve out wide right. Too wide in fact. Both men clip the net when the ball is back in play, Murray's backhand looping out long. Murray staring defeat in the face...

An amazing forehand winner from Kevin Anderson! It's such a long way back for Andy Murray, who is two mini-breaks down. "Let's go Andy," chants New York.

Image source, Reuters

Murray to serve....first attempt crashes into the net. The second is met by an Anderson forehand and a couple of exchanges later Murray finds the net again. Mini-break to Anderson...

Murray nets, Anderson holds early on.

Murray grimaces and raises his right fist towards his box - he is a point from holding. And then...crash! The third seed spanks a wonderfully-timed ace straight down the middle. Tie-break....

Petra Kvitova, who has beaten Johanna Konta: "It was a very difficult match. She served very well. At the beginning, I was the worst player, but I kept my serve going and waited for my chance.

Image source, Reuters

On dealing with mononucleosis: "My coaches are not very happy, but I have learned that I don't have to practice that much. We are managing the schedule, because you never know how you are going to feel the next day."

Murray moves 30-0 ahead - this should be a comfortable hold. Shouldn't it? Ah, maybe not. Anderson hauls himself back to 30-30 after Murray plants a backhand into the net....

Just when you think Anderson might crumble, he bounces back with a quality hold. The possibility of reaching his first Slam quarter-final at the age of 29 is not getting him hot under the collar - at the moment. Now he is back within one game of a historic win....

It's all over for Johanna Konta, a remarkable story comes to an end. She matched Petra Kvitova for long periods, but, in the end, the class of the two-time Wimbledon champion shone through. Still, tonight's showing suggests there is much more to come from Konta.

**Four hour klaxon**

The match passes through the four-hour mark. That makes me feel tired even reading it. A weak backhand into the net gives Murray a 30-0 advantage, then he blasts an ace down the middle to move within a point of the game. Then Anderson has a nasty feeling of déjà vu as the Briton does exactly the same in the next point.