Scottie Scheffler is enjoying the tricky conditions at this year's U.S. Open, sitting two strokes from co-leaders Will Zalatoris and Matthew Fitzpatrick heading into Sunday's final round.

Despite a strong start, the world number one could only manage a one-over 71 at The Country Club on Saturday, finishing on two-under after 54 holes.

In windy and overcast conditions, only seven players posted scores under par on moving day in Brookline, with nine under par for the tournament after three rounds.

After his round on Saturday, Scheffler was far from bemoaning the difficulties he or the field has faced, insisting it is why he is playing the tournament.

"I think the U.S. Open is very taxing, mentally and physically," he said. "I think that's all part of what this makes this tournament so fun. You're going to get tested all different kinds of ways, whether it be physically, mentally, whatever it is. This golf tournament is going to test you.

"That's why I show up here. I think that's kind of the fun of it. If every golf tournament was like this, it would be in for a long season for all of us. A few times a year I think it's a ton of fun."

After a spectacular eagle on the par-five eighth to go three-under over the front nine, the conditions bit Scheffler hard, posting a double bogey and then three consecutive bogeys between 11 and 14.

A birdie on the 17th was followed up with a massive par save on the final hole after finding the bunker, and the usually stoic 25-year-old let out a rare show of emotion, triumphantly pumping his fist after a tough one-putt.

"It was good because I hit my second shot, and I hit it exactly where I wanted to," Scheffler said. "It got gusted, and it came up short. Where we thought the ball was going to end up was right on top of the bunker where I had no stance.

"So, a hole in which I really thought after a good shot on the second round I was going to walk away with five, to get out of there with four was definitely a big boost.

"I knew how hard the putt was, and that's why I was so frustrated because I had a chance to get it somewhat close, and I didn't hit a great shot."

While seven of the top 12 players heading into Saturday’s third round at the U.S. Open made at least one double bogey in strong wind and cool temperatures, Rory McIlroy was not among them.

The 2011 U.S. Open champion and four-time major winner made just one birdie in his score of three-over 73 on moving day at Brookline, but his putter provided salvation late. 

He was able to keep himself within striking distance with a string of par saves, to sit three shots back from co-leaders Will Zalatoris and Matthew Fitzpatrick heading into the final round on Sunday at The Country Club.

"It was one of the toughest days on a golf course I’ve had in a long time,” McIlroy said afterwards.

"I just needed to grind it out, and I did on the back nine. To play that back nine at even par today was a really good effort, I thought. Just kept myself in the tournament. That's all I was trying to do. Just keep hanging around.

"I had some really good putts for pars coming in, 13, 15, great up-and-down on 16, good putt on 17. Then was really fortunate at the last to get that drop from the grandstand and be able to hit it on the green from there."

With only nine players under par for the tournament, blustery and overcast conditions provided palpable difficulty on Saturday.

"I know guys aren’t going to go out there and shoot the lights out," McIlroy said. "I mean, 67 from Will out there today is unbelievable. Such a good score. 68 from Fitz as well.

"I certainly thought I was going to be a few shots further back than I was at the end of the day, but Jon [Rahm] struggled there coming in.

"Even though it was such a tough day and feel like I battled well and whatever, to still only be three back going into tomorrow is a good thing for me."

Jon Rahm remains upbeat coming into the final round at U.S. Open, after a difficult Saturday saw him finish one stroke from tied leaders Will Zalatoris and Matthew Fitzpatrick.

The world number two held the outright lead approaching the 18th hole at Brookline, but a double bogey put him on one-over for the day and three-under after 54 holes.

Blustery and overcast conditions made moving day at The Country Club more about survival, and Rahm remains within contention despite his disappointing finish to the round.

"Good round of golf," he said afterwards. "It was obviously extremely difficult conditions, the wind being a little bit higher and stronger than the last few days, a different direction. Then the course being a little bit firmer, right, that's just a recipe for difficulty.

"Obviously, I think a lot of people are just thinking about 18. The truth is, 18, it was six good shots. Unfortunately, it added up to 6, but it was all good swings.

"If anything, it was maybe a choice or a decision on the fairway bunker, but swings were good, so execution was proper. So I'm happy about that in that sense."

The defending champion hit the bunker with his tee shot on the 18th and compounded that by hitting its lip and staying there, before finding another bunker with his next shot and two-putting for the double bogey.

It came after three birdies between 14 and 17 to put him on five-under, momentarily moving ahead of Zalatoris and Fitzpatrick as conditions dramatically cooled, placing further difficulty on shot and club selection.

"After I hit the shot, I realised the ball was a little bit deeper in the sand than I could really truly see," he said.

"But I think I got maybe -- tried to be a little too perfect with the shot. I had a 9-iron in hand. That's plenty to get over that lip.

"It is what it is. I think I got a little bit too cute with the shot."

Will Zalatoris and Matthew Fitzpatrick share the lead coming into the final round at the U.S. Open, finishing a tough Saturday on four-under par at Brookline.

Only nine players at this third major of the year have scores under par after 54 holes at the Country Club, and the tied lead between Zalatoris and Fitzpatrick only came after Jon Rahm's dreadful final hole in overcast and blustery conditions.

The world number two had the outright lead coming into his final hole on moving day, but three consecutive bunker shots and a two-putt led to a double-bogey on the par-four 18th and three-under after 54.

Zalatoris and Fitzpatrick have not won as professionals in the United States, with the former agonisingly finishing second at the 2021 Masters and this year's PGA Championship.

With Zalatoris finishing his round earlier in the day, Rahm finished as the conditions further cooled, placing particular difficulty on the approach to the green with club selection.

A visibly frustrated Rahm was able to compensate with some exceptional putting on the back nine, however, sinking a long birdie putt on the 14th to put him level with the two leaders. Three birdies between 14 and 17 were undone by the last hole, however.

Scottie Scheffler recovered from a double-bogey and three consecutive bogeys between 11 and 14 to finish Saturday on two-under, securing a birdie on the 17th before a massive par save on the last after hitting the bunker.

The usually stoic Scheffler did not hide his emotions with a triumphant fist-pump after the save, which left the world number one tied with Adam Hadwin and Keegan Bradley.

Joel Dahmen and Collin Morikawa fell down the leaderboard after opening Saturday with the lead on five-under. Morikawa's natural left-to-right game particularly suffered, shooting a seven-over 77.

Dahmen is joined on one-under by Sam Burns and Rory McIlroy, who only made seven greens in regulation but stayed in contention with a string of saves on the back nine.

Shot of the day

After two birdies and a bogey through his first seven holes, Scheffler really shone on the eighth.

His stunning eagle on the par-five hole saw him leap into a two-shot lead at the summit of the leaderboard.

Player of the day - Will Zalatoris

In a day characterised by survival in blustery conditions at Brookline, Will Zalatoris was one of the few on Saturday who thrived.

His ball-striking shone on an overcast day, scoring only one bogey as the rest of the field struggled to find the green.

Chipping in

Zalatoris: "Yeah, that was brutal. When I made a mistake, I made sure I was on the fat side of the green or having room where I could maybe at least chip one up there from eight to 10 feet."

Scheffler: "There's a lot of trees on this golf course, and it's gusty as well. So it's definitely unpredictable. I think that's what happens when you get these foresty golf courses, and then with the gusts, I mean, that little golf ball is just getting thrown around all over the place." 

A little birdie told me...

- Victory on Sunday would see Fitzpatrick emulate Jack Nicklaus, winning the U.S. Open at the same course he won the U.S. Amateur, after beating Oliver Goss at the Country Club in 2013.

Justin Thomas says he is relishing the tough U.S. Open conditions despite seeing his chances of winning back-to-back majors surely disappear.

The 29-year-old, who won the US PGA Championship last month, carded a third-round 72 on Saturday to leave him on three over par going into the final day.

Thomas had no complaints over the set-up at The Country Club in Brookline, Massachusetts, where the wind made life difficult for the best players in the world once again.

"I played really, really well," he told a media conference. "It was very difficult out there. I just didn't get anything out of it.

"I fought back and stayed very patient for having some things not go my way. It's a bummer to finish with a bogey on 18, but I really played solid today.

"I hit it really well. I drove it well. Hit my irons really well. Just had a hard time saving pars when I missed greens, but yeah, tee to green I played beautifully.

"I said to Bones [his caddie Jim Mackay] walking up 18, this is how a U.S. Open should be. It's very difficult. Par is great score on a lot of holes. Bogeys aren't going to kill you.

"We don't do this very often, and I think it's very, very fitting and totally acceptable to have this kind of test and this difficult setup for a U.S. Open, and it's strictly because of conditions.

"The greens are getting firm. It's windy, and it should be tough."

Will Zalatoris moved into the lead on four under with with a hugely impressive three-under 67 and he Matthew Fitzpatrick joined him when he birdied the 15th.

Scottie Scheffler had been two shots clear before a double bogey at 11, followed by another three dropped shots in as many holes.

Phil Mickelson tried to focus on the positives after a brutal week at the U.S. Open, as he finished round two 11 over par for the tournament.

This remains the only major Mickelson has never won after he missed the cut by eight strokes.

All eyes were on the 52-year-old, who has finished second at the U.S. Open on six occasions, following his return to action in the first LIV Golf Invitational.

Mickelson joined the controversial breakaway series for the opening tournament in London last week, having been out of the spotlight for a period.

Comments Mickelson made about his commitment to the Saudi-backed league prompted outrage and led to him taking time away from the sport.

This was therefore his first tournament back in the United States since the Farmers Insurance Open in January – another event at which he missed the cut.

But Mickelson at least showed some improvement on Friday with a three-over 73, having carded a dismal 78 in the first round.

"It was okay. I had a good day," he said. "I enjoyed the week. I wish I had played better."

Despite his move to LIV Golf, Mickelson appeared to remain popular with the fans in Brookline, and he added: "The fans here have always been terrific.

"They really support all sports, and I love it when we bring golf here because they create a really special atmosphere.

"I missed competing, but I also enjoyed some time away."

Joel Dahmen is a surprise co-leader with Collin Morikawa after 36 holes of the U.S. Open at The Country Club – and he was contemplating skipping the qualifier.

Dahmen, 34, is one of three players to shoot 68 or better in both rounds, finishing the first round one off the lead after a 67, before backing it up with a 68 on Friday. Hayden Buckley and Aaron Wise both posted a pair of 68s, and are one stroke off the lead in a tie for third.

In his second trip around the course, Dahmen had a strong front nine, birdieing the first hole as well as the fifth and eighth, with a bogey on the second. He started the back nine poorly, with a bogey on 10, but followed it with seven pars and a long birdie putt.

Speaking to the media after his round, he confirmed the story that he almost pulled out of the qualifier where he punched his ticket.

"There was a lot of discussion leading up to it, yeah, the prior week," he said. "I told my wife I wasn't going to do it.

"Then I was tired at Memorial and said I wasn't going to do it. I was never really going to do it until I… sort of played better at Memorial and the game was there.

"My coach, Rob Rashell, came out and things started to trend in the right direction. And then [my caddie] Geno [Bonnalie], I felt bad because he didn't switch his flight when he could have got home Sunday night, so at that point I had to stick it out."

Clearly, he is thrilled with his decision.

"I'm incredibly happy now for sure," he said. "I mean, sometimes you take for granted what you have out here a little bit. 

"I think this is my eighth or ninth major championship, and you think not long ago I would have done a lot of things to play in one, and to think that I have an opportunity just to skip one, kind of looking back, even this whole week, you don't appreciate really.

"I've played 130-odd events. I've been six years out here. It's easy to get in a lull and be like, you just go home for two weeks and hang out and everything is all hunky-dory, but when you get here, everything changes as soon as you get on property. 

"It's a USGA event. It's huge. People everywhere. So, yeah, that changes your mind pretty quickly."

After finding some form recently, Dahmen said he is starting to encounter fans who know who he is – something he does not believe will ever feel normal.

"It is unbelievable to me how many people know my name or yell for me out there," he said. "It's weird. 

"I'm getting recognized a little bit more off the golf course – my wife will look at me, like, what is happening? 

"It's not normal. I don't know if I'll ever get used to it, but it comes with good golf."

Joel Dahmen is a surprise co-leader with Rory McIlroy after 36 holes of the U.S. Open at The Country Club – and he was contemplating skipping the qualifier.

Dahmen, 34, is one of three players to shoot 68 or better in both rounds, finishing the first round one off the lead after a 67, before backing it up with a 68 on Friday. Hayden Buckley and Aaron Wise both posted a pair of 68s, and are one stroke off the lead in a tie for third.

In his second trip around the course, Dahmen had a strong front nine, birdieing the first hole as well as the fifth and eighth, with a bogey on the second. He started the back nine poorly, with a bogey on 10, but followed it with seven pars and a long birdie putt.

Speaking to the media after his round, he confirmed the story that he almost pulled out of the qualifier where he punched his ticket.

"There was a lot of discussion leading up to it, yeah, the prior week," he said. "I told my wife I wasn't going to do it.

"Then I was tired at Memorial and said I wasn't going to do it. I was never really going to do it until I… sort of played better at Memorial and the game was there.

"My coach, Rob Rashell, came out and things started to trend in the right direction. And then [my caddie] Geno [Bonnalie], I felt bad because he didn't switch his flight when he could have got home Sunday night, so at that point I had to stick it out."

Clearly, he is thrilled with his decision.

"I'm incredibly happy now for sure," he said. "I mean, sometimes you take for granted what you have out here a little bit. 

"I think this is my eighth or ninth major championship, and you think not long ago I would have done a lot of things to play in one, and to think that I have an opportunity just to skip one, kind of looking back, even this whole week, you don't appreciate really.

"I've played 130-odd events. I've been six years out here. It's easy to get in a lull and be like, you just go home for two weeks and hang out and everything is all hunky-dory, but when you get here, everything changes as soon as you get on property. 

"It's a USGA event. It's huge. People everywhere. So, yeah, that changes your mind pretty quickly."

After finding some form recently, Dahmen said he is starting to encounter fans who know who he is – something he does not believe will ever feel normal.

"It is unbelievable to me how many people know my name or yell for me out there," he said. "It's weird. 

"I'm getting recognized a little bit more off the golf course – my wife will look at me, like, what is happening? 

"It's not normal. I don't know if I'll ever get used to it, but it comes with good golf."

Rory McIlroy is content with his performance across the first two rounds at The Country Club, coming into Friday one stroke off the lead, and finishing the same way after a one-under 69.

McIlroy trails only Collin Morikawa and Joel Dahmen, who lead at five under, but he needed to close in style to shoot back up the leaderboard after a shaky start.

His week threatened to fall apart on the third hole, but he was able to save double-bogey with a 30-foot putt to take some sort of momentum. He birdied the fifth and eighth, but bogeyed the sixth and 10th, leaving him at one under overall with eight holes to play.

But his final eight holes were magnificent, with birdies on 12, 14 and 17 to salvage an under-par round and maintain his one stroke deficit from the leaders.

Speaking to the media after his round, McIlroy said being in the hunt after Friday is all you can ask for at a major.

"After 36 holes in a major championship, that's all you want to do is put yourself right in the mix going into the weekend," he said. 

"For a little part of the day there, it seemed like I was going to be a few more behind, but I dug deep and played the last eight holes really, really well.

"That was the goal. After I bogeyed 10, I just wanted to try to shoot under par. 

"I had some chances coming up. Just played a really clean eight holes, which was pleasing. Hit fairways, hit greens, gave myself chances. Got myself right back in the tournament."

Despite being a four-time major champion, it has been nearly eight years since McIlroy's last major crown, and he said he does not think he can rely on those memories for an advantage.

"I think I have to go out with the mindset this week that I'm going to try to win my first again," he said. "I'm playing as good a golf as I've played in a long time. 

"I have a lot of experience. Yes, I've won major championships and other big events, but… just because I've done that, it doesn't mean that I'll hit better golf shots or I'll hit better putts.

"I'm in a good place. I'm really happy with where my game is at, and I think that's the most important thing."

Collin Morikawa said he feels he is becoming a more complete golfer after ditching the traditional 'cut' action to his shots in favour of a 'draw' in a bid to rediscover some form, shooting Friday's round of the day.

Morikawa was the only player to shoot 66 in the second round, backing up his Thursday 69 to hold a share of the lead heading into the weekend, along with Joel Dahmen.

To get to five under, Morikawa produced a bogey-free, three-under back nine, collecting birdies on 12, 14 and 17. His only bogey on the day came at the par-four fourth hole.

When asked if he plans on making a full-time switch to his new swing style, he pushed back, saying he instead sees it like another tool in his belt.

"No – [but] that's a great question," he said. "I think what it proves is just that you can play this game with many shots.

"I remember the first time I played with Tiger, and he hit every shot that called for it. Pin is on the right; you hit a little cut. Pin is on the left; you hit a little draw.

"I think this is just going to hopefully make my iron play and make my game a little bit more well-rounded rather than just hitting a cut – but this week we're just going to work with what we have, and right now it's a little baby draw."

Morikawa was also thankful for not copping the brunt of the weather.

"Yesterday I said I thought I'd see a 66, even a 65 from those afternoon guys – the winds picked up," he said.

"Today I thought a couple under was going to be a really good score just based on what the wind forecast was going to be like, but we got lucky.

"I finally got a good side of the draw, and it kind of calmed down a little bit on a couple holes, especially when we made the turn on to the front side. 

"I didn't take advantage, but it was nice to see some decent weather kind of fall my way. A lot of the day kind of calmed down, was really nice, really sunny."

He went on to discuss how the course is playing in a tricky way, but that there are still opportunities.

"Fairways are bouncy, and you've got to keep it in the fairways out here," he said.

"You can play out of the first cut, but you get five, six, seven yards off the fairway, you're going to be trying to run up to greens, and sometimes you can't do that out here.

"But for the most part the greens are still – I'd say they're receptive. There was probably two or three greens out here that are getting a little bouncy, and you really have to make sure you hit your spots. 

"But for the most part if you're playing out of the fairway, you have a good shot at staying somewhat aggressive to some of these pins."

Collin Morikawa and Joel Dahmen are the 36-hole leaders of the U.S. Open after an entertaining second round at The Country Club on Friday, tied at five under.

Dahmen was one stroke off the lead after the first round, and he followed it up with a strong 68 in windy conditions. He is one of three players to shoot 68 or better in the opening two rounds. Morikawa came into the day at one under, and shot the round of the day as the only player to get around in 66. 

One stroke back from the lead is a five-man group headlined by stars Rory McIlroy and Jon Rahm, along with American duo Hayden Buckley and Aaron Wise. Buckley and Wise were the two players along Dahmen to shoot back-to-back 68s.

Beau Hossler joined that group at four under thanks to a chip-in birdie on his final hole.

World number one Scottie Scheffler is part of the group at three under, and he shared the early clubhouse lead following a three-under 67. He is joined by Nick Hardy, Matthew NeSmith, Patrick Rodgers and Brian Harman to round out the top-10.

Overnight leader Adam Hadwin is a further shot back at two under with Sam Burns and Matt Fitzpatrick, while South Africa's M.J. Daffue – who was three strokes clear atop the leaderboard early in his round at six under – posted five bogeys and no birdies down the back nine to head into the weekend at one under.

Also at one under are hopefuls Xander Schauffele and Will Zalatoris, still well within striking distance, while Hideki Matsuyama and Brooks Koepka headline the group at even par.

Star-studded duo Justin Thomas and Dustin Johnson are at one over, and the pair of Jordan Spieth and Bryson DeChambeau are at two over, one stroke clear of the cut-line.

Finishing right on the cut-line at three over was recent winner Lee Kyoung-hoon and Colombia's Sebastian Munoz, who has a pair of top-three finishes this season.

Plenty of big names missed the cut, with the international contingent of Spain's Sergio Garcia, Ireland's Shane Lowry, Chile's Mito Pereira and Canada's Corey Conners all one shot out at four over. Tony Finau finished five over, Cameron Smith was six over, and the pair of Tommy Fleetwood and Viktor Hovland were both at seven over.

Shot of the day

Cameron Young had a moment he will never forget when he conjured up a hole-in-one at the par-three sixth.

There were huge cheers after the American's dream tee shot at the 165-yard hole dropped in. Young was unable to make the cut – missing out by one stroke – but not without achieving a rare feat.

Player of the day - Collin Morikawa

Morikawa produced the round of the day to ensure he is the man to catch heading into the weekend.

The two-time major winner was not at his brilliant best, but five birdies and just the one bogey at the par-five fourth putting him in the lead.

Chipping in

Morikawa: "No one has taken it deep so far and kind of run away, but you know what, right now my game feels really good. The last few days is a huge confidence booster for me heading into this weekend, and hopefully we can kind of make some separation somehow."

Scheffler: "I've been number one in the world for a while now, and it doesn't really feel like it, so I kind of like just under the radar. I can show up and do my thing and then go home and rest."

A little birdie told me...

- Young's ace was the 48th in US Open history.

- Nick Hardy and M.J. Daffue emerged from the Springfield, Ohio qualifying. They both held a share of the lead on Friday.

- Scheffler is bidding to become only the second player to win this major while world number one since the Official World Golf Rankings began in 1986. Tiger Woods (2000, 2002 and 2008) is the only man to achieved that.

- Matthew Fitzpatrick is looking to emulate Jack Nicklaus by winning the US Amateur and US Open on the same course.

Dustin Johnson is confident his decision to join the LIV Golf Invitational Series will not hamper his chances of winning more major titles.

Johnson made a promising start to the U.S. Open with a first round of 68 at The Country Club on Thursday, but followed that up with a three-over second round of 73.

The former world number one is playing in his homeland this week for the first time since he sensationally quit the PGA Tour to join the controversial Saudi-backed breakaway circuit.

Johnson does not believe his defection from the PGA Tour, and the consequence of not playing as many tournaments against the best players in the world, will make him less of a force at majors.

Asked how sharp he thinks he will remain by playing on the LIV Tour, the American said: "Just as sharp as I would playing anywhere."

Johnson is in no doubt he made the right by call by signing up to LIV Golf.

"Yeah, obviously it was a tough decision, but I feel very confident in the decision I made," he said. "Yeah, I'm definitely happy and looking forward to obviously this weekend and the rest of the events this year."

The 37-year-old says he has not experienced any hostility from the crowds in Brookline, Massachusetts this week. 

He said: "No, fans have been great. Obviously, this is a good sports town, and a lot of people come out and support the event."

Johnson was in a share of 27th place on one over with the second round still ongoing when his compatriot Joel Dahmen moved into the lead on five under through eight holes.

England's Matt Fitzpatrick and American Max Homa spoke about the unforgiving nature of The Country Club at Brookline, despite being two of 25 players to finish Thursday's opening round under par.

Fitzpatrick, who shot a two-under 68, is tied for seventh place, with a bogey-free front nine that featured birdies on the fifth, eighth and ninth holes, before three bogeys and two birdies on his second nine.

On a course billed as favourable to the long-drivers, Fitzpatrick did not finish inside the top-50 four driving distance on Thursday, but made up for it with terrific precision.

He was top-10 in driving accuracy, hitting 10-of-14 fairways, top-10 in strokes gained off the tee (1.26) and fifth in strokes gained around the green (2.59).

Speaking to the media after his round, he said enjoys the challenge the course presents, having also won the 2013 U.S. Amateur Championship there.

"I've got great memories of the place, and the whole time I've been out, I see shots that I hit and I see the places I was," he said. "I think because of that I'm a bit more at ease.

"I think the tight fairways… are a big deal. There is just a premium on driving accuracy. From there – I think you have to putt your way around here… you have to think about it.

"[Compared to the 2020 U.S. Open at Winged Foot] I feel like there is a lot of drivers, but you are then going into the greens. You can't miss on the left side because the slope is so severe, and you have no shot.

"You might decide to play to a corner on 18 with a three-wood, or you just take it even further with driver. I just think it gives you plenty of options and things to think about around this place."

Homa, who finished one shot further back than Fitzpatrick at one under, said he enjoyed his day, but was blown away by the difficulty of the greens. 

"It was good – the weather was really nice in the beginning of the day," he said. "The wind picked up, and it got a little more tricky than difficult.

"But the greens are just so – they're crazy, so it's just really hard to leave yourself good looks for birdie. I missed a bunch of putts today, but they just never felt very easy."

He added: "I have to get my speed better on the greens. They're very uncomfortable. 

"I don't know how to make myself comfortable, but just maybe try to find a speed that I like seeing the ball go in at a little more, because right now my pace just feels a little bit inconsistent."

Set to start Friday's second round on the back-nine, Homa said he expects that to be the far tougher starting position due to the difficulty of holes 10 and 12 right out of the gate, but he acknowledged "it's the U.S. Open – it's always going to be hard."

Adam Hadwin ended Thursday as the outright leader following the opening round of the U.S. Open in Brookline, Massachusetts.

The Canadian shot a four-under-par round of 66, one ahead of five players tied for second, including Rory McIlroy, who had been four under himself before bogeying his final hole on the ninth.

Callum Tarren, David Lingmerth, Joel Dahmen and M.J. Daffue sit alongside McIlroy, with seven more players on two under, including Justin Rose and Dustin Johnson.

It was otherwise not a great day for some of the LIV Golf International Series participants, with Phil Mickelson carding an opening round of 78 (seven over), while Louis Oosthuizen managed just one shot better and Sergio Garcia finished on four over.

LIV Golf's new additions Patrick Reed and Bryson DeChambeau ended even par and one over respectively. 

World number one Scottie Scheffler recovered from a wobbly start to finish on even par, while PGA Championship winner Justin Thomas ended the day one under, as did the man he beat in a playoff for that trophy, Will Zalatoris.

Defending champion Jon Rahm, Collin Morikawa and Adam Scott also shot one-under rounds of 69, while world number four Patrick Cantlay came away from Thursday two over.

Shot of the day

After ending up just off the green in the longer grass on the 12th, a precision chip from Matt Fitzpatrick still had a significant distance to travel, but slowly rolled its way straight into the hole to the delight of the Englishman and the Brookline crowd, sending him back to two-under straight after bogeying the 11th.

Player of the day - Adam Hadwin

Hadwin sat on one over after three holes, before birdieing five of the next six to catapult himself into the leading pack. The 34-year-old has never finished higher than T39th in this tournament, and also responded to a bogey at 12 with another immediate birdie at 13, and then ended with five tidy pars to head into day two as the outright leader.

Chipping in

Rory McIlroy: "I'm going into tomorrow with the mindset of 'let's keep it going', rather than 'where is the cut line' or whatever. If you don't get off to a great start, those thoughts start to creep in, 'okay, what do I need to just be here for the weekend?'"

Jon Rahm (asked about two children stealing his ball on the 18th hole): "Yes… I'm pretty sure I know who it was. I recognised the two kids that were running the opposite way with a smile on their face. (Laughing) I am 100 per cent sure I saw the two kids that stole it."

A little birdie told me...

- McIlroy's 67 was the 13th of his career at the U.S. Open, now level with Seve Ballesteros and Sergio Garcia for most by a European player at the tournament.

- Lingmerth, ranked 592nd in the world, has never finished worse than tied for 21st in three previous U.S. Open appearances, and the Swede started with a promising 67 here.

- The first round scoring average of the last 10 winners at the U.S. Open is 69.1, with 25 players hitting under that on Thursday.

Rory McIlroy said he is in a "good spot" mentally after making a strong start to his quest for U.S. Open glory.

The four-time major winner headed to Brookline on the back of a superb victory at the Canadian Open last weekend and opened up with a three-under-par 67, a score that was enough for the co-lead when he finished his round.

McIlroy made a bogey on his final hole to put a slight dampener on things, but the Northern Irishman feels in good spirits as he bids to end an eight-year wait for a major trophy.

"I think [winning the Canadian Open gave me] comfort, more than anything else," said McIlroy, whose triumph in Canada was his 21st on the PGA Tour.

"Knowing my game is in good shape, knowing that when I had to answer the call, make some birdies or do something, I was able to.

"I feel like playing 72 holes in a U.S. Open is playing under pressure the entire time, even though the tournament doesn't really start until the weekend.

"But yeah, [it gave me] comfort with my game, mentally I think I'm in a good spot, and I showed that out there today, just trying to keep myself going.

"Overall, my wedge play was pretty good, I gave myself plenty of chances. Really nice at 17. It was a little skip up the hill, I could see it pitch into the hill and zip back down the green. I hit the putt at seven a little firm, but it was nice after a couple of par saves to see another birdie go in."

Also among the early finishers was defending champion Jon Rahm, who sank a 21-yard putt for birdie on the 18th, ensuring he finished his first round with a one-under 69.

Having endured a frustrating back nine, Rahm spoke of his relief at seeing one drop.

"I played a really good first eight holes besides the bogey on three," he said. "I played really, really solid, and then the wind picked up and it was a bit of a struggle, so to finish with that birdie makes me really confident and it's a really good way to start.

"I didn't see anything go in all day, and to see that one curl in after a wayward tee shot, I got a little lucky, got a great drop and I was able to make that birdie, it's a good feeling to finish like that.

"It got a little difficult out there, I hit a lot of bad iron shots [on] the last 10 holes, so to make that putt felt really good."