Before we head off for the hills though, lets have a look at the only stats that matter.

-4: Day, Johnson, Grace, Spieth

-1: Oosthuizen, Smith, Lowry, Holmes

+1: Snedeker, Romero, Stenson, Finau, Luiten, Reed

Surely it is one of those 14 names that will be carved onto the US Open trophy come tomorrow evening.

I say tomorrow, the prospect of an 18-hole play-off on Monday looms very large.

Join me tomorrow and we'll find out for certain. Bye for now.

Iain Carter
BBC golf correspondent on Radio 5 live sport

Jason, Justin, Branden and Jordan. All their christian names end in 'n' and with that it's time for us to go. We'll be back on Sunday from 22:00 BST with the final round.

That all means that the final pairing on the final round will be Jason Day and one of Branden Grace and Dustin Johnson - whoever of those two handed in their card first.

Jordan Spieth will be in the penultimate duo.

A poser from Iain Carter as he signs off the Radio 5 live commentary...

...what do all of our leaders have in common? Answer shortly...

Image source, Getty Images

Right then. Patrick Reed's honour on the final green.

Twelve feet for a birdie, but that one is staying up for the evening.

Jordan Spieth is following along a similar line and he was certainly making notes on his playing partner's efforts.

Off it goes, on its way and.... Off line. Eighteen inches to deal with. Spieth calls in his caddy for a second opinion. "Right centre?" Right centre." All agreed and down she goes.

Reed taps in and is one over overnight after a six over round.

Jay Townsend
Former American professional golfer on BBC Radio 5 live

I think you've got to be under par at the close of today to be in with a chance of winning on Sunday. Let's not forget the winner often comes out of the final group.

Jordan Spieth has a long, deep and meaningful with his caddy as the pair consider his third shot into the last green.

It's good to talk.

One hundred and twenty seven yards to the pin turns to about seven feet as he nails his short iron perfectly.

Sublime. And he will have his next putt for the solo overnight lead.

Image source, Getty Images

Dustin Johnson's second actually found the sand, but a graceful sweep with his third puts him up to within 20 feet.

Branden Grace's birdie attempt from way down town is good but not quite there.

Johnson's turn to have a bash. Agonising. Just short. Both sign off with pars.

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Dustin Johnson's second at the par-five last is not quite long enough. It might be alright though, it all depends on the lie.

Branden Grace, who has taken a sideways swipe to rescue a wayward tee shot and get within 154 yards, pitches up close the flag. One of the gullies on the green partially abducts his ball, dragging it off towards the sand, but the brakes kick in just in time to stay on the green.

Spieth is safely off the tee behind them. I believe he has found the fairway.

Jay Townsend
Former American professional golfer on BBC Radio 5 live

Every player inside the top 10 is under 32 and that means golf is in a great state.

Jordan Spieth allows himself a hop of frustration.

His birdie putt on 17, skirts around the rim, but doesn't take a final turn south and down.

He will have to make do with a par.

Jay Townsend
Former American professional golfer on BBC Radio 5 live

Image source, Getty Images

Jason Day provided one of the greatest performances I've ever seen. It reminded me of 2008 when Tiger Woods won the US Open with a broken leg. Golf is a game but I think it was a heroic effort.

Jordan Spieth chances his arm on the par-three 17th and has come up triple cherries.

Attacking the front bunker, he clears the sand by a fine margin and gets his reward as the ball hops on and to within 10 feet.

A birdie chance and if he converts he is the sole leader.

Jay Townsend
Former American professional golfer on BBC Radio 5 live

Spieth is fighting tooth and nail when he doesn't have his best game today. I bet he'll be on the range tonight trying to work this out.

"Be lucky" shouts Branden Grace after his tee shot on 18. He will have to wait and see whether his instruction has been obeyed. The ball is off wide somewhere. The secret will all be in the lie.

Dustin Johnson's tee shot - a particularly fine creature - is plum centre. Lovely stuff.

Image source, Getty Images

Argh!

Jordan Spieth leaves another shot out on the course as his birdie putt refuses to fall. He could have has a comfy cushion of a lead to rest on. Only a par.

Dustin Johnson has his par at 17. Brandan Grace has a better chance of birdie though. His 30-footer takes a good look the hole but decides not to buy.

No change at the top.

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Jordan Spieth trying to read the runes of the 16th green, heading up a slope and dealing with a right-to-left break.

And he should have given it a little more muscle. The slope gets its claws into the ball as its momentum stalls and Spieth will have a tricky eight feet or so for birdie.

Onto the par-three 17 and Branden Grace walks the tightrope between over-eager and too conservative perfectly.

His tee shot stays well clear of the bunker guarding the front pin position, but nestles up nicely 20 feet away.

Dustin Johnson is more erratic. His ball rolls back down onto the lower deck of the two-tier green.

Image source, Getty Images

Dustin Johnson goes all around the houses to try and land his eagle putt on 16, hitting up the slope and then finding that there was not the borrow that he hoped there was in that.

He is taking an age to line up his six-foot birdie putt. It would put him into the lead solo-style. Jordan Spieth and Patrick Reed are being kept waiting on the tee.

The ball dribbles wide when he does come to take on the putt. Just the par then.

Branden Grace has his own chance for a birdie. His putt stubbornly refuses to break though and we are as you were at the top.

As they depart, Spieth has just bashed a fine drive up to within 20 feet. That is a slim eagle chance for him.

Image source, Getty Images

And then there were four.

Jordan Spieth is back into a share of the lead with a birdie on the par-three 15th.

Playing partner and fellow overnight leader Patrick Reed has had an iffy day, but he makes his birdie, shooting straight down Spieth's line to move back to level par overall.