Break point saved!

It was an impressive return from Paul but Norrie had an answer to it.

Norrie hits a curling forehand winner down the line to bring up game point but, despite some excellent running back and forth, Paul gets in a smash on the next point to bring up deuce again.

And before you know it it's break point.

We're heading to a fifth set on court two.

Belgium's David Goffin has pulled his tie with American 23rd seed Frances Tiafoe level by winning the fourth set 6-4.

The winner will play Cam Norrie or Tommy Paul in the quarter-finals.

Jonathan Jurejko
BBC Sport at Wimbledon

Wow! Incredible point which Cam Norrie wins to leave many home fans leaping out of their seats like they've just pressed an eject button.

Tommy Paul, who covered almost every blade of grass, has to catch his breath at the back canvas.

It's left most of us watching breathless, that's for sure.

John Lloyd
Former GB Davis Cup captain on BBC TV

Fitness is one of the three things as a player that you're in total command of - the serve, the fitness and the mental side.

The way Cameron Norrie serves so quickly it's like he looks across the net and thinks he's in better shape than his opponent, that is a tremendous advantage.

That rally should have ended SO many times.

One for the highlights reel for sure. Norrie looks like he's caught Paul out with a drop-shot, but he gets there.

The ninth seed lobs his American opponent, but he gets there.

Paul eventually reaches for a backhand smash and that one goes wide. He goes and leans over the towel holder to recompose himself.

After such gutsy running, it's probably fair that the game ends up at deuce after Norrie's forehand goes wide.

Top seeds Rajeev Ram and Joe Salisbury have the advantage in the third set of their third-round match in the mixed doubles with Rafael Matos and David Vega Hernandez.

Ram and Salisbury lost the opening set, won the second and are 3-1 ahead in the third.

Norrie's working his way through this one quite quickly. They've been on court around an hour so far.

Contrastingly, the match that will determine the opponent of whoever wins this, between David Goffin and Frances Tiafoe, is in a fourth set and might be going to a fifth.

Not to get too ahead of ourselves, but if Norrie were to make it all the way to the semi-finals he could face Novak Djokovic.

For now, Tommy Paul has just held serve and Norrie remains a break and a set up.

Tommy Paul gets to 30-30 on Cam Norrie's serve, but then flicks a forehand long to undo all his hard work.

A powerful first serve from Norrie is enough to wrap up the win.

It's all coming up Norrie on Court One.

Tommy Paul slaps a shot into the net and Cam Norrie converts the first of his break points.

He only needed one break to win the first set...

Lleyton Hewitt
Former Wimbledon champion on BBC TV

At the start Sinner looked more nervous to me, but it was his return of serve that made the difference for him in that first set.

Some flashes of brilliance from Alcaraz - who apes Andre Agassi with one superb forehand winner on the run - but he is still making too many mistakes.

Sinner is serving well now - he overcame ace machine John Isner in the last round and there are shades of the giant American in the way he wraps up this first set with a big delivery that Alcaraz cannot get a racquet on.

Hello...

Norrie has two break points.

Tim Henman
Former British number one on BBC TV

Cameron Norrie looks so comfortable in this game. He has really grown into his position here.

He looks confident, just going about his business.

Lee Fergusson: So Impressive in that first set from Cameron Norrie!!

Image source, Getty Images

Norrie is still in the ascendancy as he holds much more comfortably than Paul.

It's all going in the right direction.

Paul and Norrie engage in a few lengthy rallies but the ninth seed's efforts land wide of their mark to give the American his hold.

It did look like Norrie might get another early break there, but not to be.

Here we go on set two.

Cam Norrie gives Tommy Paul no respite as he sends the American scampering all over the place again to win the opening point.

He goes 30-0 up on Paul's serve as Norrie pins him into the corner with a cross-court forehand.

Unfortunately Norrie can't seem to find the court on the next few points, but Paul pays him back with a backhand into the net and it's deuce.

Jonathan Jurejko
BBC Sport at Wimbledon

Suddenly got a little gloomy on Court One.

Not the atmosphere, which is still sparkling after Norrie won the first set, but the light.

Overcast in SW19 as the thick nimbostratus gather above.

Sinner has been struggling to hold his serve so far but he turns the tables here, with a couple of devastating returns helping him get the first break of the match.

"Sinner has got such wide wingspan on both sides but for me it is his balance that helps him the most at the back of the court," said former Wimbledon champion Lleyton Hewitt. "He was a great skier when he was younger and you can see that by the way he moves so well now."