Image source, Reuters

Jordan Spieth began yesterday with his putter on fire. It has has turned on him at the first today. He contrives to three-putt on from ten feet on the first for a bogey.

Branden Grace's birdie putt veered sharply off line as well. These greens are not getting any better.

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Dustin Johnson heads a little right with his tee shot on the first. But that is safe enough.

Jason Day steps back from his ball, surveys the scene, and then steps up to bang a humongous drive down the left-hand side of the fairway. That is the racing line. They don't come much better than that as opening salvos go.

Former European Ryder Cup golfer Thomas Levet, similarly to co-leader Jason Day, suffered from vertigo for seven months during his career.

He told BBC 5 live the condition was like "walking on a waterbed" and playing with a ball on "spongy ground".

He added: "For him (Day) to focus like that and hit the ball like he did yesterday is just unreal."

Levet also said a win for the Aussie today would top Tiger Woods' win with a broken leg at Torrey Pines in 2008.

He said: "I think it is even better because you can play golf on one leg, but playing golf with no balance and a moving ball its right up there."

Jay Townsend
Former American professional golfer on BBC Radio 5 live

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The largest 54-hole comeback was Arnold Palmer in 1960 from seven shots back.

Rory McIlroy began the day eight shots back.

The one thing worse than his vertigo for Jason Day is probably the way that he is being pestered with sincere offers of help from various officials as he makes his way to the first tee. If the doctors and scans have not found him a solution, I'm not sure a course official will have the key.

Up on the first green, Branden Grace has chipped up to within 10 feet for a birdie chance.

Iain Carter
BBC golf correspondent on Radio 5 live sport

Here's Branden Grace on the first fairway. Whenever he has led after 54 holes he has gone on to win the tournament and that has happened on six occasions.

Nikki Scrivener: "I think Peter Scrivener's portable chipping net is still in its box in the cupboard #bbcgolf"

So many things wrong with a portable chipping net. Use it at home and it quickly gets very expensive in window and lawn repairs, take it anywhere else and they probably have some nets for you to aim at anyway.

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Adam Scott has come in under the radar like a stealth fighter. Successive birdies on seven and eight shuffle the Australian down to level par.

Jordan Spieth is summoned to the first by the chummy tee announcer.

The young American gun would have that one back in a shot though. Not quite a snap hook, but his ball has swerved left like a Roberto Carlos free-kick.

Branden Grace is more solid - finding the friendly green carpet laid up the middle.

Just one more group to get going.

Jeff on Twitter: "Day to win. Useless golf gadget- those long metal things sticking out of the bag. #theydonthitstraight #usererror."

Is this round going to be a footnote reminding you what might have been?

Or one that makes headlines around the world?

Rory McIlroy tickles in his birdie putt, and he has nothing to lose and everything to gain by going hard at the next eight holes.

There are just seven players and four shots separating him from the top of the leaderboard.

Chris Kirk:, external Responses have been 50/50 so far. Half agree with me and half think I'm a spoiled whiny brat. All entitled to your opinions just like I am.

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Jason Day is on the practice range. And he does not look the full ticket.

He has been blinking and breathing hard, wiping the back of this hand over his face and generally looking like he should be tucked up with a hot lemon.

A hot lemon wouldn't do any good though. It is vertigo that he had been struggling with, but he has been doing it manfully.

Lee Westwood hit a closing level-par 70 to finish nine over. He said: "It's very scoreable. They haven't gone silly with the flags, But there are still tough holes.

"It's the kind of course I'd like to come and play with my mates, with a cart and some beers.

"It's been a strange atmosphere. The fans have not been able to follow a player round. From a fan's point of view they could watch Phil Mickelson's tee shot on the first and then you can't see his next until his second on the second because you can't get down the first hole."

Rory, what are you doing to us here?

His wayward teeshot on the 10th has got lucky with a favourable lie in a fairway bunker. One hundred and fifty-seven yards to the pin and McIlroy takes a huge chunk out of that figure with a superb iron straight at the flag.

He has a 10-footer for another birdie.

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JB Holmes is muttering. And it is nothing good.

His third shot on the first rolls straight back to his feet as it fails to scale the slope guarding the green.

His second attempt makes it to the summit, but he will be putting from distance for a bogey.

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Rory McIlroy has gone after his tee shot on the 10th. Plenty of snap in that swing.

But it has propelled his ball off left. It is either sandy or gone where the wild things are in the deep rough.

McIlroy will hope for the former.

Jay Townsend
Former American professional golfer on BBC Radio 5 live sports extra

"McIlroy has played great from tee to green. If he gets hot on the back nine there is no telling what he might do."

Rory McIlroy with a tricksy 10-footer for birdie on nine. If this goes in it will lob some petrol on the barbeque.

His putt stays north though and he goes through the turn at three under for the day. I think only Billy Horschel has matched that score on the front nine so far today.

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There are some Irish accents in the gallery to make Shane Lowry feel at home on the first tee.

His tee shot is a little snatchy though, hooking off left and into the rough.

He and JB Holmes are two of the four men who started the day on one under.