Charles Nurick: Andy's on fire, Djokovic is terrified. Andy's on fire, Djokovic is terrified. Na na na na na na na na na na na na

Bennyben: You're in his head Andy. Come on!    

Chris Goldsmith: Is Novak Djokovic trying to finish the match asap so he can watch Honey G on X-factor?  

Three break points!!! THREE!

Murray is 40-0 on Djoko's serve with a humdinger of a whipped backhand from out wide which whistles past his opponent. Astonishing.

Djoko saves the first after Murray's error, but makes a mistake himself in the next point when he puts too much on his groundstroke.

Djoko is broken. And broken.

Andrew Castle
BBC Sport tennis commentator on BBC Two

Djokovic has knocked the stuffing out Murray there and had won the rally but on the 30th shot he has had an absolute nightmare. That is even worse than the overhead. I don't know where his head is?

Djoko wins the first point on the Murray serve! The Scot's backhand from the baseline drifts wide.

A quarter chance for the five-time champion.

But it's cancelled out as the Serb once again finds the net. Fatigue? Does that word exist in Djokovic's world?

Murray moves to 30-15 and then somehow it's 40-15 when Djoko - on top of a rally like Hillary on top of Everest - inexplicably hits the net with a simple forehand volley at the net.

Murray holds by winning the next point.

Image source, Reuters

David Baker: Are we seeing the changing of the guard? Let's hope this is the start of Murray's dominant time. 

Hazel Steel: Watched hubby run Valencia marathon thought that was exhausting now following Andy c'mon Andy!!  

pengedragon: Djokovic injury timeout in 3,2,1...   

Jude Law looks contemplative. I wonder if he's envisaging himself in a Wimbledon 2?

Djoko holds after being 0-15 and his initial error from the baseline.

He needs to break back soon.

Is that Rylan in the crowd? Ah, no it's Olivier Giroud.

Andrew Castle
BBC Sport tennis commentator on BBC Two

Djokovic has got to turn this around quickly because he is on the way out here.

Image source, Getty Images

Mark G: Never seen Djokovic miss so much, good news for Murray.

Cathryn: Andy is playing more aggressive tennis than in previous matches. It's making a huge difference.   

Richard Shuttleworth: I love when Murray places really aggressive! Save the defensive game for the big servers!   

This has the feel, dare I say it, of Murray v Wawrinka. It's like the Scot has had special laser surgery on his Eye of the Tiger. Bionic.

He races to 40-0 but then makes a strange error on an attempted backhand drop-shot.

No mistake with the next point as he fires down a ferocious first serve which Djoko is lucky just to get a racquet to.

Two-nil.

This was the moment Andy Murray took the first set and (whisper it) a giant step towards the title and securing that world number one spot...

Andrew Castle
BBC Sport tennis commentator on BBC Two

It is a sign of the respect and esteem that Djokovic holds the groundstrokes of Murray that these errors are coming. Djokovic needs to bellow or throw a racket or something because he is inhibited. You can see it. Murray can see it.

Andrew Castle
BBC Sport tennis commentator on BBC Two

There have been years when you wouldn't want to hit the Djokovic back-hand. he has made as many mistakes as I can remember on the back-hand side today.

Image source, PA

Djoko finally comes out on top in a rally as Murray's forehand topspin return creeps out.

The Serb has advantage, which he loses after another backhand flies into the court netting.

Deuce then break point again. Now guess which stroke Murray utilised once more? The backhand slice. 

Now, will he take this chance?

For sure. Another error by Djokovic from the back of the court hands the Scot the early advantage.

Murray's a machine. Well oiled.

Not worth asking "what have you got Djoko?" - he's been asked that a lot during his career and had a good answer more often than not.

However, and this is a big however, Djokovic's backhand is letting him down. He then struggles to deal at the net with a venomous return from Murray.

Two break points. Already.

The 12-time Grand Slam champ saves both - first after an error and then following a big first serve. Deuce.

But wait. Murray sneaks a winner which caresses the line. Djoko challenges but the replay shows it was clearly in.

Break point again.

Saved once more as Murray finds the net.

To be continued...

Charlene Beedie: Djokovic's body language doesn't usually show this. I feel for him. Fight Novak. Show why you want and should be the no.1 player.

Alice Stainer: Rarely seen #Djokovic, external make that many errors. Wow. And #Murray, external's stepped it up a gear. Confidence flowing like champers!  

Andrew Castle
BBC Sport tennis commentator on BBC Two

That is for me, something of a turn-up. Fantastic performance from Murray. If ever there was a testimony of his fitness regime, that is it.

Andrew Neill: This is great tennis. That forehand to break was sublime!!!  

Meer Shah:#Murray, external breaks first. Did someone say he was suffering from fatigue?! It's almost as if Djokovic is more tired than Murray!  

James Diamond: This feels completely different to past Murray v Djok matches. You'd think Murray had the better head to head.

Image source, AP

This is counter-punch after counter-punch, but this time Djoko is on the receiving end.

Murray's blows are harder, more accurate and have more variety.

The Scot is just making sure he stays in the rally and is stringing Djoko from side to side. 

Djoko looks to shorten one rally at 30-15 by searching for a quick winner, but his double-handed backhand swipe is out. 

Two set points for Murray.

The world number one takes the first set as Djoko finds the net.

Murray has not beaten Djokovic indoors. Yet.

Image source, Reuters

Andrew Castle
BBC Sport tennis commentator on BBC Two

That is really gutsy stuff. When you bear in mind yesterday, which was such a drain on his resources. But this is superb. He doesn't look totally fresh but he is moving unbelievably well.