What a shot this is. The penultimate group are onto the second and Louis Oosthuizen has put his tee shot right up against a tree trunk on the left of the fairway.

It looks as though a chip out is all he can do but, with his back up against the tree and his feet in the roots, he avoids the obstacle on the back swing and somehow makes the green. The South African just comes short with his lengthy birdie putt but that'll still feel like a shot gained rather than dropped.

The same can't be said for Francesco Molinari. He follows a double on the first with a bogey and slips way back.

A few drops of rain falling now as Matsuyama finds the green from the first cut of rough. Kisner continues in steady fashion by playing into the heart of the green and Day - after another drive well over 300 yards - plays a majestic pitch to three feet.

Image source, EPA

It was dark, very dark when Jason Day, Dustin Johnson and Henrik Stenson finished their second rounds late last night.

It was clear none of the players fancied an early alarm this morning to complete their second round as they were seen jogging between holes to beat the hooter which signals the end of play.

Day in particular was grateful to Johnson for rushing through and theoretically giving the Australian - who is the best placed of the trio - a better chance of a low round today having escaped the early rise.

"That's the biggest or most clutch thing I've ever seen anyone do for me," Day said. "I had to give him a hug for it.

"He was happy as well obviously, to be able to finish and not have to wake up at 5.30."

Image source, EPA

Mark James
Former Ryder Cup captain on BBC TV

Day looked brilliant yesterday. He is hitting it absolutely miles.

He looks back to his best but whether he is we don't know yet. He might not even know. We will have to find out.

Kevin Kisner kept it simple in his press conference last night. Speaking in a slow Californian drawl, he said: "Guys work too hard trying to figure out golf courses instead of just getting the ball in the hole."

Italian Francesco Molinari has had a shocker at the first carding a double bogey. He hit his first shot into the rough, his second into a bunker and it didn't get any better from there with another four shots needed to find the hole on the par four. That sees him drop out of the top five.

Molinari is in the penultimate group alongside Chris Stroud and Louis Oosthuizen who both made par.

Kisner's double breaking putt from distance touches the hole but stays up so he makes par. Matsuyama misses on the right from four feet and makes his first bogey for 22 holes to drop out of the lead. Day holes from four feet for par. Be the man, Jason.

Mark James
Former Ryder Cup captain on BBC Red Button

Matsuyama won last week and has been playing so well this year that mentally he will be so prepared for the last two rounds.

Greenside bunker for Matsuyama but from the middle of the fairway Day puts it in the same trap. Kisner is on the green in regulation.

Matsuyama took his hand off the club, as he so often seems to, but this one does go out to the right and into some thick stuff.

PGA secretary Jim Richerson bellows out the names of the final group on the first tee. He doesn't have the subtlety of former European Tour starter Ivor Robson, who once offered me a lift to Wentworth that I sadly had to decline, but there is plenty of power there. Huge cheer for Day, who I have just been given in the sweepstake for who will lead at the end of today. Come on Jason. Two back to start with remember, I might not see that pound again.

You can tune into BBC TV coverage right now - at the top of this page, on the red button and iPlayer.

The final threeball are waiting on the first tee and this is how our two leaders, world number three Hideki Matsuyama and world number 25 Kevin Kisner compare...

Image source, Getty Images

There have to be some perks of having your brother in the field at the US PGA Championship, right? Even if he missed the cut.

Today's BBC Radio 5 live Morning Drive clip comes from official PGA player transport as reporter Diane Knox borrows the car that should have belonged to brother Russell Knox.

Diane, Iain Carter and Will Perry discuss the day ahead and the chances of the favourites Hideki Matsuyama and Jason Day.

Watch on the link below.

BBC Sport app users may have to click view more to see this tweet.

The shot tracer has to be one of the finest innovations in sport. I would love to see how they do it. Twice former winner Vijay Singh is still launching them off the tee at the age of 54, that has gone 125 feet up. The big Fijian is six over though, he took a triple bogey at the par four fifth hole.

The leading British player Paul Casey has just got under way on the first tee. He's playing alongside Americans Rickie Fowler and Justin Thomas.

The trio get along well - just look at the love in the clip below ahead of the round - with Fowler describing them as "buddies".

“It will be fun to see the three of us feed off of each other and get some good rounds going,” he added.

Cute.

BBC Sport app users may have to click view more to see this tweet.

Diane Knox
BBC Radio 5 live reporter at Quail Hollow

The grandstand on 18 is starting to fill up as the first groups of the day start to make their way towards the final hole.

Like yesterday, it's extremely hot and humid but storms are expected to hit later this afternoon.

Spectators are sheltering from the heat of the sun in any shade they can find.

BBC Sport

As with the first two days you can watch today's action live on the BBC.

The coverage is on air from 19:00 BST as the leaders head out on the BBC Red button, the top of this page and on BBC iPlayer. Eilidh Barbour, Ken Brown and the team will then switch from the red button over to BBC Two at 22:30 BST for the business end of the round.

Don't miss it.

Saturday 12 August

19:00-00:15 - BBC Red Button, BBC Sport website, BBC iPlayer

22:30-00:15 - BBC Two

22:00-01:00 - Radio 5 live sports extra

No fireworks from Rory McIlroy today. Resuming at two over after successive 71s, the 28-year-old world number four dropped a shot at the second and he is three over for the Championship.

Image source, Getty Images