John Millman keeps the show on the road for another game at least. 

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Amanda Holden and Mary Berry are sat together somewhere in the stands. 

Plenty of shared ground there you would think to discuss the pros and cons of their respective talent shows. It looks like they are saving that chat for the first-set drinks queue though.

Deuce on the Millman serve.

Simon Bennett: Two Centre Court tickets bagged for tomorrow. Queue time jumped from 60 minutes to 3 minutes :-) #bbctennis, external

Charlene Beedie: After all that wait time and being asked to "sit tight" there are no more tickets #Wimbledon, external#MiddleSunday, external#BBCTennis, external"

Watch as Andy Murray lobs Australian John Millman in the second game.

Tom Fordyce
Chief sports writer at Wimbledon

A true seat-gripper of a fourth set, momentum swinging one way then the other, Djokovic screaming at the packed stands, Querrey the silent assassin. No-one watching dare glance away.

Sloppy serving from Querrey and Djokovic has three break points.

Querrey's 30th and 31st aces of the match, however, get the big server back to deuce.

But Djokovic creates another break chance, but a stretch-volley from Querrey saves it.

Another chance...and Djokovic takes it. A breakthrough at last. 

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Andy Murray bulldozes through a service game. 

That Millman break of serve disappearing in the rear view mirror like an unwanted stop at Watford Gap services now.

It looks like that lapse is not going to cost him more than small change in the first-set scoreline.

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Andy Murray was disgusted with himself after surrendering his serve in the last game.

He takes that frustration out on unfortunate John Millman.

His groundstroke game is tightened and tidied. Love-40 in twinkle as Millman sails long off the backhand.

Murray guesses right on a smash on the next point, returning Millman's overhead back right onto his toes. He can't claw back.

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We have a game that didn't go to deuce! Djokovic holds.

Hummm, he's now also holding his shoulder. It looks a little tight. Roll it out, Djoko, 

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Tim Henman
Former British number one on BBC TV

Seven games in 46 minutes on a grass court is pretty rare. 

Hands like anvils as Andy Murray sticks a botched drop-shot into the net to offer up 30-30.

A little halt in the Briton's service action as the court cover ruffles in the wind and puts him off his toss.

A forehand long and Murray is facing up to break point. A big serve followed by an inside out forehand sees that away.

Another from deuce though. Into a rally, back and forth, Millman giving as good as he gets and Murray buries one into the midpoint of the net.

Back on serve.

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Just the 25th ace past the world number one for Sam Querrey. Remarkable numbers from the big American.

Of course we end up at deuce again, because this is how these cats like to roll.

A third ace of the game from Querrey gives him the advantage but back to deuce we go after he forehands wide.

Ace number four (28 overall) gives Sam another advantage and he holds. This is exhausting. 

Andrew Spirrett: Finding myself willing every Djokovic ground stroke long...   

Tom Swain: Come on Andy Murray, but also, COME ON SAM QUERREY.  

Nathan Smith: Both playing great tennis, but Djokovic has been riding his luck today.  

Djokovic and Querrey do battle at the net and a magic little tip-over from Djokovic has the Serb punching the air in delight. The boy errupts!

He takes the advantage and roars again as Querrey puts his shot long. Djokovic holds. 

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John Millman was down on Centre Court a couple of hours before his match to try and get his bearings around the grand old place.

It looks like he is still getting his feet under the table as he bops a backhand long and loopy.

That gives Andy Murray a look at 15-30, but the Australian knuckles down to see out the game and get on the board.

It's raining break points on Court One. Sam Querrey has two this time. 

The American snatches into the net on the first and then Djokovic pummels a forehand winner into the corner. Deuce again for the millionth time this match.

Advantage Querrey for another break point. 

Djokovic puts his first serve into the net and then Querrey goes long at the baseline. Deuce again. 

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This is very much going to plan for Andy Murray if he is planning his evening around a Euro 2016 semi-final viewing.

John Millman fails to lay a finger on the Scot's serve. A hold to love.

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Andy Murray draws the first ooh and ahhs from the crowd.

First a delicious top-spinning lob across court that drops in and then a deft half-volley pick-up dropper. 15-30.

And now two break points.

Into a rally. Murray mixing it up like Tom Cruise in Cocktail with a cheeky deep slice forehand. Millman can't digest the dish that he is being served up and coughs up long.

Tim Henman
Former British number one on BBC TV

Twenty-four aces past Novak Djokovic in the match is a seriously good number.

These two are struggling on serve.

Novak Djokovic has another break point, but he wastes it to take the game to deuce. 

A 22-shot rally is won by a Djokovic dropshot...but we have a second deuce thanks to a Sam Querrey ace - his 24th of the match!

A Querrey forehand down the line sees him gain the advantage and the American sees it out. 

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