So 17 players are within four shots of leader Dustin Johnson on nine under.

The Americans biggest challengers could come from the group of experienced players including Paul Casey, defending champion Brooks Koepka, Justin Rose and Jason Day.

Or perhaps young guns Scottie Scheffler, Cameron Champ or Collin Morikawa might spring a surprise.

Be sure to join us again for what promises to be one of the most thrilling climaxes to a major in years.

It's a shame there won't be crowds at Harding Park to see it.

Tommy Fleetwood birdies the last!!!!

Three words: IN THE MIX.

The Englishman moves up to six under.

A brilliant chip and run from Li leaves him half a foot shy - a par finish for five under. Four off the lead and the pressure is off on Sunday.

Tommy Fleetwood plays a beaut from the sand - a birdie chance for the world number 13.

Playing partner Li Haotong has a slightly tougher task.

Dustin Johnson has won one major so far - the US Open in 2016 - and he's put himself firmly in contention for a second with a round of 65, including a personal best of eight birdies.

"I putted really well, that was the key," he said. "But I hit a lot of good shots to give myself some good looks because the flags are tucked and the greens are firm and fast. I did hit a lot of quality iron shots.

"Tomorrow I definitely need to hit some more fairways because it's really tough playing this course from the rough, and the bunkers too are tough.

"I definitely have experience in this situation, which will help tomorrow. I've been in the hunt a bunch of times in a major, and I've got one major, so having that experience will be beneficial. I'm still going to have to go out and play really good golf."

Jason Day's putt at the 18th sneaks past the hole - it's par and six under overall. Despite the Aussie's apparent disappointment, he's only three behind leader Dustin Johnson.

The final two.

Li Haotong strikes a poor drive from the 18th tee but he looks to have avoided the trouble on the right. He is back at five under with playing partner Tommy Fleetwood, who makes a better job of his shot.

Justin Rose finishes with par which should have been a birdie had he shown more conviction with his putt at the last - he finishes on six under.

Playing partner Brooks Koepka sinks the birdie - as expected - seven under and only two behind leader Dustin Johnson.

It could be a heck of a tussle between them on Sunday.

Jason Day is wearing the 'oven gloves' - it's getting nippy out as the evening sets in in San Francisco.

Now then.

Brooks Koepka, on six under, has a birdie at the last following a dead-eye iron approach. He will make the birdie. Fact.

Li Haotong drops one more at the 16th - five under, having started the day at eight under before moving up to nine under.

Two to play, so he can salvage something from this.

Cameron Champ is half an inch from making a birdie at the last. Nevertheless, it's a 67 and eight under overall - what a superb display from the Sacramento-born 25-year-old.

Three pairs left on the course.

Image source, Reuters

Brooks Koepka misses a birdie putt by a width of one of those leaves on the many trees at Harding Park.

Six under for the American - the same score as Aussie Jason Day, who says something to the heavens after making a birdie on the 16th - his first since the opening hole of the day.

Casey finishes off with par - solid putt for seven under. He could well be Dustin Johnson's biggest threat on Sunday.

Paul Casey looks a good bet to finish his round on seven under overall after a lovely mid iron to about six feet of the 18th hole.

Ouch!published at 02:07 British Summer Time 9 August 2020

02:07 BST 9 August 2020

Li Haotong drops another shot - he is now at six under. That double at the 13th seems to have affected him.

Koepka bogeys the 15th and falls back to five under. Playing partner Justin Rose also makes a bogey - back to six under for the Englishman.

Dustin Johnson is the new clubhouse leader after a par at the last for a 65 sees him stay on nine under overall - currently a one-shot lead.

Brooks Koepka's hopes of a 'threepeat' are falling apart.

He goes from rough to rough on the edge of the green. An attempt to pitch the ball out sees him only make a couple of feet.

He's on six under - he won't remain there.