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What a beautiful second shot from Justin Rose to put his ball close to the hole on the first green. You can't afford to be left in your approach and the Englishman did not err, settling two feet in front of the flag.

Jordan Spieth is on the green but has a much longer putt to tackle. Jason Day follows his monster drive with the worst of the second shots, leaving him high on the top side of the putting surface.

Jordan Spieth is away with a drive that he plants in the middle of the first fairway. Jason Day follows him and creams one along the same line and past the American's ball. Justin Rose completes three good drives by also finding the strip.

Scott, Edinburgh: The greens only look "atrocious" as they dont have the dye on them that other TV courses have. I like watching this course. Far more interesting than usual.

Darren Clarke goes from sublime to ridiculous on hole one with a long-iron second shot to within a few feet of the hole, followed by a shocking putt that goes left past the hole. That first green is full of bobbles but it would be very generous to let Clarke off on that one.

Joint-leader Dustin Johnson on Twitter:, external Very happy with my round today, but lots of golf left. Love it here!! #USOpenChambersBay

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Jordan Spieth will hit the course in about five minutes time, teeing off with Australia's Jason Day and England's Justin Rose, the 2013 champion.

Richard Corke: Who's going to say it? The greens at Chambers Bay are in atrocious condition. We'd be very unhappy with anything as bad at Southport & Ainsdale (NW UK so climate no excuse!)

Rory McIlroy, who shot a two-over 72: "I thought the course was set up well. It was set up so you can score well. It is out there with the conditions as there is no breeze. If anything it reiterated what I was thinking coming in to this week that you can be really aggressive with your tee shots and go for certain pins. It is not a typical US Open where you have to play a game of chess. I need more of the games from tee to green and try to figure something on the greens."

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Henrik Stenson was content with his opening round as he holed four birdies in his final five holes to join Dustin Johnson as clubhouse leader.

Here's his thoughts: "I had a great start but then had a couple of frightening holes in the middle of the front nine. But I holed some bombs late on. It is a tricky course. I think they did a good job setting it up. I'm expecting a few more five-under-par rounds and then (the USGA) could easily make it a different animal by the end of the week."

Tiger Woods continues to warm up on the practice range. He is kitted out entirely in black. Let's hope that isn't an ominous sign. He is due to start his round at 22:28 BST along with fellow American Rickie Fowler and South Africa's Louis Oosthuizen.

Here's a few words from our joint clubhouse leader Dustin Johnson: "I got off to a great start. drove the ball really well, hit some good irons and had a lot of good looks at birdies and for the most part I played really solid.

"There are a few holes where you have an advantage if you can fly it 290+ yards but you've still got to hit good drives."

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Colin Montgomerie sinks a par putt on his final hole to break 70 and end with a one-under 69.

Patrick Reed claims a birdie on the ninth to end his round four under, a shot off the current lead.

A couple of names we've not mentioned yet: Francesco Molinari and Jason Dufner. The Italian former hit four birdies and two bogeys in a two-under round of 68. The Ameerican latter has a matching record with a chance to better it with a good showing on the 18th.

Patrick Reed gets a lovely big bounce to send his tee shot skipping from the front to the middle of the ninth green and within 15 feet of the hole. If he can sink that he'll finish a shot off the clubhouse lead.

Kaymer salvages par on the ninth to finish two over before handing over to Rory, who misses his shorter effort, sending the ball skipping a few feet past. The Northern Irishman's putting has simply not been good enough. He finishes seven shots off the clubhouse lead on two over par.

-5 D Johnson, H Stenson (Swe)

-4 P Reed

-3 M Kuchar

-2 C Gribble, J Dufner 17

Selected:

-1 P Mickelson, C Montgomerie (Sco) 17

+2 R McIlroy (NI)

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McIlroy plays a good bunker shot to leave his ball 10 or so feet short of the hole at the ninth. Kaymer's long putt flies past to give him eight feet for par.

Henrik Stenson has had a belting last nine holes. He makes it four birdies in his last five holes with one at the 18th. He is now tied for the lead with Dustin Johnson. Lovely stuff from the Swede.

Martin Kaymer is on the green with his tee shot on his last hole, the ninth. Rory McIlroy looks to better it but is five yards short of where he needed to be and dribbles back into the bunker at the front of the green.

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Sergio Garcia comes within an inch of a birdie on his last with a 20-foot putt that will give Dustin Johnson a good idea of the line he needs to follow. The American is agonisingly short of completing one of the great up and downs. He ends with a bogey to finish five under.

Adam Scott bogeys as well to finish on a level-par 70, the same total as Sergio.