So Andy Murray will now face Mischa Zverev, the world number 50, after the German won 6-1 4-6 6-3 6-0 against Malek Jaziri earlier on Friday. 

It will be a first Grand Slam round four match for Zverev, who occasionally enjoys dressing like a Battenberg cake...

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Andy Murray speaking on court: "It was obviously tough. Sam, especially in the first set, was hitting big serves. The key moment was saving break point and breaking the next game – I had the momentum."

On his ankle problem: "I felt better and better as the match went on. I was hesitant at the beginning but I was moving well at the end."

On his legion of fans in the Hisense arena: "Thanks for the support. It was packed from the first ball. We love that as players. I’ve really enjoyed being back here."

Just. One. More. Ball.

Andy Murray's never-say-die attitude pays off as he chases down a drop-volley and does just enough to get the ball back over the wire.

It still should be meat and drink for Sam Querrey but he duffs into the bottom of the net to allow Murray a break point at 30-40.

And that is all he needs.

Murray cracks away a winner and is a hold of serve away from the match,

Murray might still have some work to do but we know who will be waiting in round four, as and when the Scot gets the job done - Germany's Mischa Zverev, elder brother of ATP wunderkind Alex 'Sascha' Zverev, has beaten Tunisia's Malek Jaziri 6-4 4-6 6-3 6-0.

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A tired forehand into the net from Sam Querrey under little pressure seems to be him heading towards the exit in the game.

But the American comes out on top in some nip-tuck at the net, flipping the ball over the top of his man and sliding away a volley in response.

Deuce.

But Murray ushers Querrey out of the game before he can do any more damage,

A delicious cascading lob, a change-up forehand and, from 40-15 adrift, Murray is nibbling at Sam Querrey's heels. Deuce,

No change to be pilfered from the pockets of the American though. Querrey holds and this third set is turning into a bit of a dogfight. 

Sam Querrey is starting to pose a few questions.

A deep ball, right up on Andy Murray's toes, earn him a look at 15-30.

A cunning slow second serve from Murray befuddles Querrey like someone attempting to explain a googly to an American.

And, from deuce, Murray makes his escape with his pace proving unreturnable on the volley.

Sam Querrey drills a backhand right up onto the back edge of the line to seal the game from 40-30 up.

Andy Murray asks the question. The video review  confirms that the ball sniffed chalk though.

Querrey ahead for the first time in the third set.

Some smart net play from Sam Querrey gives him 0-30 and something to push against.

But the American is hurried out of shape at the back of the court for 15-30 and then sees Murray splatter away across court for 30-30.

Querrey sets up a volleying chance with a deep forehand and Murray can only find his opponent's strings.

Break point USA.

Murray sees that off with an easy rolling forehand down the line.

Here comes a second though...on a second serve.

Backhand pumped wide with the court gaping and Querrey has a route back into the set.

Sam Querrey is staring a double break in the face at 30-30. All sorts of demons and gremlins massing on her service arm.

But the American buckles down, keeps his cool and knocks down a little more pace to keep Murray at bay.

Andy Murray has racked up some considerable serve stats.

He has landed with 70% of his first serves and has won 82% of points behind that shot when he has.

A fifth ace of the match carries him through as he consolidates that break.

Sam Querrey has changed his shirt. A deep blue number comes out of his bag.

But he cannot change the way this match is flowing.

Another break of serve bagged at the very start of the third set.

Querrey teetering.

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John-Laffnie de Jager, Heather Watson's coach, on 5 live sports extra: “Sam’s taking too many risks now, some sloppy mistakes trying to take the ball on, but Andy makes you do that. Smart play from Andy, he’s not firing but he’s playing well enough.”

Sam Querrey dumps a forehand into the net and flops his chin to his chest.

Murray, as tenacious as a Jack Russell with a tennis ball, has prised the second set from him.

Full steam set three.

And that is the second set signed, sealed and delivered.

It is not yet up on the scoreboard, but with Murray serving strongly, Querrey fading and a double break in the Briton's backpocket, you can cash out.

Andy Murray lassooes a wrong-footing forehand against the grain and past Sam Querrey.

Slick from the British kingpin and the spotlight is swinging back on the Querrey serve so fast he must feel he is under a strobe. 

Andy Murray is deep in discussions with himself at the back of the court.

"Energy!", "Too tall!", "Shocking!"

He is peeved because a 0-30 lead has been whipped from underneath him as Sam Querrey survives with space to spare.

Andy Murray tightens his headlock on the match.

Sam Querrey nibbles off the first point of the game, but four more rattle off the Murray racquet strings.

Might that be the game on which the match pivots?

Sam Querrey is all out of kilter, clumping long to offer up three break points at 0-40.

Murray takes the first and has his nose ahead early in the second.

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