Matt Wallace, one of just two players in the top 10 under par so far today, is still seeking a second birdie.

He'll struggle to find one on the par-four ninth though. His second shot has just landed on the green way left of the hole.

Not here obviously.

You can almost see Brooks Koepka making a mental note as another hole is chalked off.

It's as you were folks.

Dustin Johnson is just muttering something to himself as he strides across the green at seven.

'Hit it man' would be my guess after coming up a fraction short from miles away. His decent start at two under for the day continues with a par though.

That tee shot has left Matt Wallace around 40ft from the hole. His putting's been decent all day though and it's no different here. He gets to within a few feet and should make par.

Brooks Koepka misses another fairway up six.

It's fine though he'll just rock a wedge from there.

Anthony Wall
Two-time European Tour winner on BBC Radio 5 live

If you had a five-shot lead who wouldn't you want chasing you? I'd say Dustin Johnson.

Matt Wallace hits it quite long on the eighth. I'd have been a bit worried about that going in the water, but it lands on the back of the green.

Image source, Getty Images

The green sits some 50 feet below the drive zone, but the hillside is now fairway and that allows for the option of driving to the bottom and leaving a short pitch.

While all that was going on earlier, Rory McIlroy bogeyed the 15th after a duff out the rough.

But he's made up for it with a lovely 22-foot putt on the 17th for birdie. He's one under for the round.

Solid as a rock. Brooks Koepka wasn't great off the tee at five but it was no problem at all.

He barely flinches when presented with a challenge and recovers with a stunning wedge to within three-feet of the pin. Another par.

Andrew Cotter
BBC Sport commentator

There's a shorter par five than a par four on the course today. The par-five fourth is 517 yards. The par-four seventh is 524 yards.

Matt Wallace has a 30ft putt for birdie on the par-four seventh, but it's too big of an ask.

The ball curls round to the left, but stays within 5ft or so.

Hello. DJ might have something to say. The lead is down to five strokes.

Image source, Getty Images

A downhill drive to a fairway that sits at a slight left-to-right angle. Large overhanging oaks are left of the hole and the relatively small green sits on a ridge.

Nicola: If Koepka wasn't so far in front this would be a very exciting final day of this PGA Championship.

What do you think? Has Brooks Koepka made this boring or should we be enjoying the incredible golf he's playing?

Each of the last 23 winners of the US PGA were at or within four shots of the lead entering the final round.

There were no players within six shots of Brooks Koepka entering today's final round.

And nothing has changed after a handful of holes. He's still well on course.

Iain Carter
BBC Sport golf correspondent at Augusta National

If Brooks Koepka wins today it will be a fourth major in his last eight starts.

Only Jack Nicklaus, Ben Hogan and Tiger Woods have done that before.

There's no eagle for Brooks Koepka, who comes up a touch short with his putt. He was doing that all Saturday as well.

Still, a birdie at this stage is probably good enough.

Harold Varner III hoists a double-bogey SEVEN. Not bad considering.

It's enough to drop him off the top end of the leaderboard. That prize money is dropping....

"I love you Jazz!"

Jazz Janewattananond said after his round yesterday that he'd been enjoying the New York fans. They do seem to be behind him.

He comes close to back-to-back birdies but takes par on the fifth.