Oooh. Narrowly right of the cup from Scottie Scheffler with his birdie attempt, before he jabs in for par, and a scrambling par for Cam Smith keeps the lead at four.

But Scottie Scheffler quickly followed suit.

This was Cam Smith's birdie a few moments ago...

Does Cam Smith have the room to make a full swing against with grandstand behind him? Doesn't look like it, he'll take a drop but even so it's a difficult chip from here, especially with Scottie Scheffler lurking on the green for birdie...

Smith trickles it up to within a few feet. Superb.

Image source, Getty Images

It's been hard going for Shane Lowry but a birdie on eight means he's now right back where he started his day on two under.

The former Open champion needs to put his foot down now and start stringing some birdies together to try and put some heat on the leaders.

Image source, Getty Images

A four-shot lead for Scottie Scheffler so it looks pretty comfortable right now - and yes, that's Rory McIlroy in a tie for third!

-11 Scottie Scheffler

-7 Cameron Smith

-4 Rory McIlroy, Im Sung-jae,

-3 Justin Thomas

-2 Shane Lowry

-1 Corey Conners, Will Zalatoris, Danny Willett

Selected others:

E Morikawa

+2 Tommy Fleetwood

+3 Lee Westwood, Sergio Garcia

+13 Tiger Woods (F)

Right of the green from Scottie Scheffler with his second at the par-five eighth, while Cam Smith overshoots the dancefloor with his third shot after clipping out of the bunker. He sends a few seated patrons scrambling to their feet to avoid it.

Image source, Reuters

Rory McIlroy is on the 12th tee. Are his nerves starting to jangle yet? There's been no sign of it so far he really is swinging his clubs with total freedom.

Here he goes, whipping a eight or nine iron over the daunting presence of Rae's Creek right onto the green. It's a long putt for birdie and that's not got quite enough oomph behind it. Par ain't bad mind.

Cam Smith thuds his driver into the turf in frustration after leaking it slightly right at eight, may well have to get his bucket and spade out to retrieve that one.

Scottie Scheffler is currently as cool as the ice in your Arnold Palmer.

As nonchalant as you like.

Is this the point where Rory McIlroy starts to believe that anything could be possible later today?

Remember there's an audio feast awaiting if you tune into BBC Radio 5 Live right now.

Image source, Getty Images

Cam Smith's mullet is flowing out the back of his cap like a superhero's cape in the Augusta breeze, and the Australian shows his superhuman touch with a tidy putt to make birdie at seven.

But Scottie Scheffler can hit straight back here. And he does. Captain America is not fazed.

In it goes.

There may well be a bounce to his stride but Rory McIlroy looks in bother at the 11th.

He snaps his second right and now has a horrible up and down to save par. Here comes his chip....oh that's not bad at all. Really delicate hands from McIlroy just to get within 10-12 feet.

Big putt on the way.

Two decent tee shots at seventh, Cam Smith's outstripping the leader by 20 yards or so. But that approach from Scottie Scheffler, phwoar, a delightful wedge from the world number one that lands beyond on the green and then reels back in like a yo-yo to give him an uphill putt.

Cam Smith just tickles a sand wedge into the smooth stuff and comes to a half just above the flag.

Im Sung-jae gets his first birdie of the day to return to the four under mark he began his round on.

He's right there you know and he played his last 11 holes in five under yesterday - something similar would really make things interesting..

Alistair Bruce-Ball
Commentator on BBC Radio 5 Live

Grandstands filling very quickly in Amen Corner - this is where it can really be glory or ruin for a Masters challenge. Rory McIlroy flying along with five birdies on the card today.

It is an absolute picture, as always. You can see the bounce in his stride - I think he must be loving the buzz of being in the chase.

Tommy Fleetwood's steady if unspectacular round continues at the ninth. Not a blemish or birdie on his card yet.

Justin Thomas will have wanted a birdie on the par-five eighth, but that's a heck of a par he's pulled off after a visit to the trees then a big miss to the left to leave him a testing up-and-down on the short side.

A par keeps the round going though.

A shuffle of the feet and a shake of the head from Danny Willett on the par-four ninth aka Carolina Cherry.

Another birdie putt. Another par.