It must surely now be time to fall asleep at the desk? Yes, apparently it is. Hurrah! But there will be more live text commentary later in the day when Day 11 gets under way in New York. It's the men's quarter-finals and there promises to be fireworks between Roger Federer and Gael Monfils as they aim for a place in the last four. Until then.

For those of who like stats with their breakfast (or bedtime aperitif), Djokovic becomes the seventh player in the Open era to win 50 matches at Flushing Meadows and he is now level with Roger Federer and Ivan Lendl in having reached eight consecutive US Open semi-finals (Jimmy Connors leads the way with a record 12).

Russell Fuller: , externalDjokovic, the mighty competitor, outlasts Murray in 4 sets: Federer looks like he'll have to clear the ultimate hurdle to win his 18th GS

Kei Nishikori, US Open 2014 semi-finalist

"What a night again! Very happy with my win. Now two days to get ready for semi's. Excited for the next opportunity."

Image source, Getty Images

Defeat for Murray, which means he will drop to 10th in the world rankings, but plenty of positives. The Scot's forehand was magnificent, and he would have steamrolled the majority of players on that form. Unfortunately, Novak Djokovic is a man who has the ability to resist and endure like no other. The top seed is into the last four and favourite to secure what would be his second US Open title.

Nick Wall:, external Fair play Novak, but Murray missed chance at start of 3rd set when Djok seemed on the ropes. Always hanging on when Djok won it.

Image source, Getty Images

Djokovic extends his record to 13 victories in 21 matches against Murray. The Scot departs with a wave. Djokovic will prepare to face Kei Nishikori for what will be his eighth consecutive US Open semi-final.

"Of course, I'm very glad to get through to another semi-final," says Djokovic. "Andy has changed his game for better in the last couple of years. He's an established top player, someone who has immense quality."

"My thoughts are just directed to sleeping right now," he adds. "Or party. What do you say? Let's party." Sleep first, Novak, party later.

"First of all I want to thank all the fans for staying so late. I hope you guys had fun and I hope you enjoyed watching," says Djokovic to those who remain in Ashe even though it's 1.30am in New York.

Image source, Getty Images

"We both gave our best. At times, the tennis was not that nice, we made a lot of unforced errors. We played two sets in two-and-a-half hours and I didn't expect any less."

Murray distracted by the spectators' cheers. "Ladies and gentlemen, please," says the umpire. And Murray launches his first serve into the net. Second serve is good, but the forehand not so great. Opening point Djokovic.

Both players dipping into their energy reserves, but it is Murray who folds first in a lengthy rally - a clumsy forehand into the tape for 0-30 score.

Image source, Getty Images

The jaws soundtrack isn't quite playing yet but Murray in dangerous waters. He reduces the deficit, but botches a backhand and now the Scot must dig deep. Two match points. Der-dum... der-dum... An ill-timed yell from a spectator, the other ticket-holders hiss. Murray has nothing left to give. His time on court is over. Into the barrier he goes. Djokovic survives.

Neither player's serve has been truly tested in the last four games or so. A well-timed Murray return the only blot on an otherwise A1 Djokovic service game. The Serb a game away from victory.

Ruby Prakta: "Just back from a long trip, called into work tomorrow and...turning on the radio. OK Andy & Novak, blaming you if I'm late."

Barry W: "Murray looking lead-footed and sapped, possibly from slugging all those forehands, but then he's always played a good possum."

Edward Cassels: "Murray looks dead on his feet. Remains a possibility that this just a ploy to lure Djokovic into a false sense of security."

Fulford Maths Department: "We're in school already, preparing for our students... Or maybe sat in A14 cheering on @andy_murray reading @BBCSport updates!"

Gold star for you, sir.

The trainer trots onto the court to give Murray some sort of package, which the British number one places at the back of his chair. The back causing the Scot some concern, apparently. Murray moving rather sluggishly, but manages a hold to love.

Image source, Getty Images

Murray overcooking his shots and is run ragged on the final point. Djokovic dragging him towards the net, then sending him back to the baseline before forcing the Scot to return to the tape with an irretrievable volley.

Pat Cash
1987 Wimbledon champion

"Andy Murray v Novak Djokovic has been brutal but Murray's feet are hurting, this issue is catching up to him in the fourth."

Murray takes off his sweat-drenched t-shirt and replaces it with a lavender-smelling, crisp white top. (Disclaimer: I have no idea what sort of fabric conditioner Murray uses so his clothes may, or may not, smell of lavender.)

Anyway, there's a tennis match going on and it happens to be quite an important one. Murray 40-0 ahead, but there's a sense that Djokovic is the stronger of the two. Nevertheless, it's a hold to 15 for the Scot - Djokovic returning long on the final point.

Cowboy-style yeehaws as Djokovic sends an ace flying by Murray's ears for 30-0, but from 40-0 ahead to deuce. A double fault, a backhand return down the line, a sizzling forehand winner. Talk of Murray's physical demise was very much exaggerated... But a nerve-easing ace followed by a wild return ends the Murray revival.

Murray throws up a double fault and he could be in a spot of bother here at 15-30, but he ups the ante to nudge 40-30 ahead. The Briton resembling a punch-drunk boxer, though, as he watches a Djokovic overhead whizzing by for deuce. I cannae be bothering chasing that, he says. But the Scot is hanging on.

Image source, AFP

Murray's resistance is made of rice paper as Djokovic clicks into gear with a hold to love.

Image source, Reuters

Amelie Mauresmo looks on from the the players' box. She's been sitting there for nearly three hours! Three hours! Just sitting there watching tennis for three hours! Yep, delirium has set in, just as a sense of weariness has set in for Murray.

The Scot lacking zip and he allows Djokovic back at deuce. Djokovic spoons a forehand into the tape. Advantage Murray. The Scot slaps a forehand into the tape. Deuce. But, somehow, he scrambles free to reduce the arrears.