Matthew Southgate pars the final hole to close out a round of 65 and finish as the highest placed Englishman on four under.

-10 Spieth (15)

-9 Kuchar (15)

-6 Li (18)

-5 McIlroy (18), Cabrera-Bello (18)

-4 Southgate (18), Leishman (18), Noren (18)

Selected: -3 Casey (18), Kim (18), Grace (17); -2 Z Johnson (18), Wood (18), Poulter (18)

Full leaderboard available here.

The whoops and the hollers have barely died down before Matt Kuchar steps up and plonks in his birdie putt.

Jordan Spieth is the outright leader.. again. Three holes to go...

Jay Townsend
BBC Radio 5 live golf expert

That is incredible. This kid is really special.

Are. You. Kidding. Me? Jordan Spieth has only just gone and holed out that eagle putt. What a man.

Jay Townsend
BBC Radio 5 live golf expert

He went for the extra sand there and tried to run it out. He needed a perfect position, which shows incredible hold of his nerve.

He landed it in the perfect spot - great shot by Kuchar.

Spieth has already eagled the 542-yard 15th once this week - can he do it again? Kuchar waves to his admirers in the galleries, trying to crack a smile but his face seems frozen in concentration/fear.

Kuchar pulls his sand wedge out of the bag, the ball appears to have a decent lie. A chunk of sand flies out, his ball appears from the desert storm to pitch on the hump in front of the pin, ball gently galloping down towards the pin. Excellent shot, excellent chance of a birdie.

Diane Knox
BBC Radio 5 live reporter

He's behind the fence, we think. Plenty of punters are gathered to get their goods signed by Andrew Johnston. Good to see the Englishman sticking around after a one-over 71 left him one over the championship.

Image source, BBC Sport

Bogey for Brooks Koepka, who drops to three under.

But further up, on the 18th, Rafa Cabrera-Bello has salvaged that horrible tee shot with a superb approach from some thick rough and set up a chance for a birdie at the last.

He made back-to-back birdies yesterday at 17 and 18 - can he do it again today?

Fifteen feet to make it. No! That just slips by. A very impressive round from the Spaniard, he finishes at five under.

Uh oh. Kuchar has blinked first. He tugs his second shot on the par-five 15th into a bunker on the left.

Spieth follows with a belter of a strike, his ball bouncing just before the green and scampering up onto the left shoulder. A beast of an eagle putt awaits.

Iain Carter
BBC Sport golf correspondent at Royal Birkdale

I think it is a two horse race with two par 5s to come. I don't think six under will cut it but who knows, we have seen some truly incredible stuff today.

On to the 15th tee... Spieth whacks his drive down the middle, Kuchar's ball following his playing partner's like a shadow. You could throw a picnic blanket over the pair of them.

This has turned into a multi-million pound poker game in Vegas. The coolest head will win.

All square! Matt Kuchar must be wondering how he is still not the outright leader. Because of some stone cold brilliance by Jordan Spieth.

After robbing a bogey from 14, he confidently drills in the birdie putt on 15. Kooch couldn't convert his own birdie putt, although he gave it a good crack, knocking in for par.

On to the par-three 14th then. Kuchar has gone par-par-birdie here, Spieth birdie-bogey-par.

Kuchar looks worried, he thinks his ball is not going to make the dancefloor. it is. Just.

What's Spieth got. His best shot of the day! What a time. A six feet birdie putt awaits.

This has got more twists and turns than a log flume.

Before his final round Matt Kuchar was asked about whether he would change his game if he was within three shots of Jordan Spieth going into the stretch home. i.e. would he be more aggressive.

Even in his heart of hearts, Kooch would not have been thinking about what his tactics would be if he was leading with five holes to go. That's where he is....

Jay Townsend
BBC Radio 5 live golf expert

It was an amazing five it really was. To make a bogey from where he was that showed a lot of guts.

Image source, Getty Images

Rory McIlroy throws metal behind his ball in the bunker and leaves around five feet for par... job done. That's a fine round of three under par and catapults him to tied for fourth. Remarkably he's near the top of the leaderboard. Back track 72 hours and he was five over through six holes. What might have been...

Well, so much promise after a birdie at the last, but Rafa Cabrera-Bello then hooks his tee shot on the 18th in a crowd of spectators and lets out a frown.

That'll take some finding.

Rafa Cabrera-Bello climbs out of the sand and sets up a birdie chance on 17.

He's got a six-foot putt to go five under. That's good from the Spaniard, straight as you like and right on target.

He joins Rory McIlroy in tied fourth.