Now then, Murray might get a look in here as the formidable Querrey serve breaks down momentarily.

Murray plays a wonderful backhand to go 0-40 and that's three big break points...

One saved with a whipped inside-out forehand. Good shot. Murray thought the serve was out and is chuntering away after taking a look at the ball. Not sure what he can see on the surface...

And another saved as Murray hits a return into the top of the net. Can he capitalise?

Into the net again! A huge roar and two slaps on the thigh of Murray. We saw this the other day from Murray.

Shot! A deft lob on the bounce, that's genius, he's till ticking away to the line judge though! 'Right in front of your eyes mate...'

His frustration fuels his play though as he gets another break chance - TAKEN!

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Goran Ivanisevic
2001 Wimbledon champion on BBC Radio 5 live

Querrey doesn't do anything on Andy's second serve. For me, he's staying too far back. He's not taking the ball early or putting any pressure on the second serve and he's mis-hitting the returns. He needs to change something

Watch Andy Murray display his fine athleticism to pick up a winner close to the net and then his fine shot-making with a gorgeous drop shot in the very next point.

Murray to serve at 2-3 down then, still on serve in set two. He brings Querrey in to the net and then finds a killer backhand right down at the toes of the big man. Shot.

Querrey then gets a rare look at the Murray second serve and puts it away superbly, much to the frustration of a gentleman in a Norwich kit in the crowd.

A lucky net cord bounce then gives Querrey a point, 40-30, he acknowledges his fortune in time-honoured tradition. But Murray holds with no real drama.

One, two, THREE fist pumps.

Wimbledon in microcosm.

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Gilles Muller breaks Marin Cilic's serve twice to take the first set.

We could be in for a tie-break or two during the duration of this match now, both players look very solid on serve.

Sam Querrey is winning every point when he lands a first serve, which he has done 75% of the time in the second set.

It makes for some short games as the big-serving American rattles off another hold, despite a wayward forehand cross court.

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Murray comes tearing across the court to meet a Querrey drop shot, lunges and somehow manages to pat a lovely forehand winner beyond the American.

Up to the net again comes Murray, and he claims the point as a sprawling Querrey nets from out wide. A floaty backhand, time to perfection, and that's a love hold for Murray.

These are the statistics from the first set on Court One. Some great serving stats from Gilles Muller, with 75% of first serves in, and winning points in 87% of those.

Nine unforced errors already from Marin Cilic, not what you would expect from the world number six.

John McEnroe
Three-time Wimbledon singles champion on BBC Two

You know Querrey's serve is, ultimately, what's going to save him if he's going to do something big today.

Andy Murray has made an assured start, helped by Sam Querrey starting poorly. That first set was wrapped up in under half-an-hour.

Andy Murray dictates a fine rally off the Querrey serve, finding the lines on both sides, swinging the big American from side to side. It gifts him a cheap point at 0-30 too, is this a sniff of a break chance?

Querrey throws in a serve and volley and there's the first glimpse of Murray shouting to himself, he's frustrated at missing a chance there. Querrey holds.

Jonathan Jurejko
BBC Sport at Wimbledon

Kick back in an idyllic spot, watch a bit of tennis...

Image source, BBC Sport

...and feed the Wimbledon fish at the back of Murray Mound. What a life.

This is only the second time Gilles Muller has made a Grand Slam quarter-final - the other time being at the 2008 US Open - but there are no signs of nerves from the Luxembourg man.

The 16th seed breaks Marin Cilic's serve twice to take the first set, and will serve first in the second.

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Textbook serve and volley stuff from Andy Murray, so well placed to meet Sam Querrey's return. He looks totally at home out there. Moving as well as he has all fortnight.

He holds to 15, chalking off the game with an ace down the middle.

Sam Querrey was a bag of nerves in his opening service game in the first set but he's much more settled now, banging down an ace on his way to holding to love. That pattern may be set now.

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John McEnroe
Three-time Wimbledon singles champion on BBC Two

It was Murray's experience, his pedigree, his place in the game that won him that first set. Querrey got too tight in the beginning.

Andy Murray has a read of his notes during the break. You'd love to know what sort of stuff he writes down in there. Motivational quotes? Basic points? Tactics?

Querrey opens the serving in the second set.

Marin Cilic hits a superb forehand return off Gilles Muller's serve.

Mats Wilander
Former world number one on Radio 5 live

The best players in the world have all these different plans. Andy Murray is suddenly starting to hit the ball harder and finshing at the net. Players like Sam Querrey don't have the confidence to mix their game up. That's the difference with the big four.