A weather delay gave Augusta leader Justin Rose time to reflect on a mixed start to Saturday's play at The Masters.

Rose had led by four strokes after the first round but saw that advantage cut to a single shot on Friday, with Will Zalatoris and Brian Harman his closest challengers.

The one-time major champion was last out on moving day but quickly set about restoring a healthy lead.

Indeed, birdies at the first two holes had Rose three clear at nine under, yet this hot streak did not last.

Rose found the bunker at four and could only rescue a bogey, before befalling the same fate at the fifth, the sand contributing again.

The Englishman recovered with par at the sixth and had just played a solid tee shot at seven when an official approached and sounded the horn to signal an imminent storm.

As play was suspended, Rose was again one ahead of Zalatoris, who was joined at six under by Marc Leishman.

Corey Conners was the day's big mover to that point, in a tie for fourth after playing 11 holes at three under.

Conners' hole in one at the par-three sixth was the highlight, coming straight after the first of two bogeys.

Justin Thomas and Hideki Matsuyama - both one under for the day - were level with Conners, while Harman was back at four under following three bogeys and a birdie through seven.

Jordan Spieth's challenge faltered, although a superb birdie brought him back level with Harman after a double-bogey at seven had threatened to knock him out of contention entirely.

Patrick Reed - two under on Saturday and one under for the week - and Phil Mickelson - three under to reach even par - were among those to complete their rounds before the weather hit.

Defending champion Dustin Johnson, Brooks Koepka, Sergio Garcia and Rory McIlroy all missed the cut at the Masters on Friday, while Justin Rose remains in the lead.

Johnson, who won the Masters for the first time in November, shot a three-over 75 on the second day to be five over overall and miss the cut by two strokes.

World number one Johnson made three bogeys on his final four holes to miss out, having previously impressed at Augusta, with top-10 finishes in his past five appearances.

He made four birdies on the front nine but also had two bogeys and a double bogey on the fifth.

Johnson becomes the third Masters champion in the past 15 years to miss the cut.

"Six three-putts in two rounds, you just can't do that," Johnson said. "Obviously didn't drive it great but drove it good enough.

"I never was really too bad out of position, just the three-putts killed me. You take all the three-putts away, I'm one under. That was kind of the difference."

The 36-year-old was joined by four-time major winner Koepka with a similar round to miss the cut, along with 2017 Masters winner Garcia, who shot an even round of 72 to finish at four over.

Four-time major winner McIlroy (74) and two-time Masters runner-up Lee Westwood (71) also failed to make the cut, with both unable to recover after poor first days at Augusta.

At the other end of the leaderboard, Rose sits one shot clear of Will Zalatoris and Brian Harman after a second-round 72, having led by four shots on the opening day.

Rose bogeyed four of his first seven holes on Friday, before steadying with three birdies on the back nine to salvage his lead.

"I think it was just a classic day at Augusta National when you're just slightly off," Rose said.

"You can be a foot or two out on certain occasions and you end up struggling. I think maybe off the back of yesterday, it starts to feel pretty different pretty quickly. But I told myself going up the eighth hole, you're leading the Masters, your frame of reference is a little bit different to yesterday. Four ahead is something, but you're still leading so like just enjoy it and keep going."

On his Masters debut, 24-year-old Zalatoris moved up the leaderboard swiftly, aided by five birdies on his back nine, including three straight to finish his round as he carded a four-under 68.

Harman also moved into contention after three birdies on his final six holes to finish with a three-under 69.

Australian Marc Leishman and last week's Texas Open winner Jordan Spieth are tied for fourth after both enjoyed strong rounds on Friday.

Bernd Wiesberger and Tony Finau both shot 66s on Friday to storm up the leaderboard into joint sixth alongside four other players, including world number two Justin Thomas.

Justin Rose mounted a back-nine recovery to finish his second round with a two-shot lead over Jordan Spieth and Marc Leishman.

Rose shot a sublime opening round of 65 at Augusta, but relinquished his four-shot advantage on Friday before returning to the top of the leaderboard with three birdies in his space of four holes.

The Englishman was the man to catch on seven under when he signed for a level-par 72, rallying after bogeying four of the first seven holes in his second round.

Gains at the 13th, 14th and 16th holes gave Rose momentum heading into the weekend as he bids to don the green jacket for the first time.

The in-form Spieth surged into a share of second place with Australian Leishman by carding a four-under 68, with birdies proving easier to come by for the field than on the opening day.

Three-time major champion Spieth, on a high after ending a title drought stretching back to 2017 at the Texas Open last weekend, made four of his five birdies after the turn and only dropped one shot at the 12th.

Leishman also made a significant move, setting the tone by starting with three birdies in row and going on to shoot a five-under 67.

Scintillating six-under rounds of 66 from Bernd Wiesberger and Tony Finau put them just three shots adrift of Rose along with Justin Thomas, who shot a 67.

Will Zalatoris, Brian Harman and Si Woo Kim were also well poised on four under, with their rounds still in progress. Defending champion Dustin Johnson had work to do back on three over through 10.

Bryson DeChambeau responded to a poor opening round with a 67 of his own to sit at one over, while Brooks Koepka (+5) and Rory McIlroy (+6) were facing a battle to make the cut 10 and eight holes into their rounds respectively.

Lee Westwood was a couple of shots below the projected cut mark on five over midway through his round.

Overnight leader Justin Rose was faltering through nine holes of his second round at the Masters on Friday.

The Englishman made light of tricky scoring conditions to shoot a stunning seven-under-par 65 in round one, during which he picked up nine strokes from the eighth hole having played the first seven at two over.

But after starting bogey-birdie on Friday, Rose dropped three more shots before the turn and was at four under for the tournament midway through his second round.

Bernd Wiesberger was only one shot back having gone through 14 holes at five under for the day, while Hideki Matsuyama and Brian Harman were the same score but yet to begin round two.

Jordan Spieth was only two behind through four holes of his second round, with Marc Leishman among a cluster of players also at -2.

Tommy Fleetwood, Tony Finau and Cameron Smith were all playing the round at three under as the leaderboard bunched up early on Friday, while Justin Thomas was back at level par overall.

The likes of Jon Rahm (E), Dustin Johnson (+2) and Rory McIlroy (+4) are scheduled to tee off later on Friday.

Justin Rose "reset" after a tough start at the Masters before firing a stunning seven-under 65 to take the first-round lead on Thursday.

The Englishman produced his best ever round at Augusta, equalling the second largest first-round lead in Masters history with his four-stoke advantage.

Such a position looked unlikely for Rose when he bogeyed the seventh hole to be at two over.

But his response was incredible with an eagle at eight and birdie at nine, before six more birdies followed on the back nine.

Rose said the eagle at the eighth hole was what he needed to settle into the tournament.

"It maybe settled me down if I'm honest. I kind of knew two over through seven is not the end of the world, but also knew you're going in the wrong direction," he told a news conference.

"You can't win the golf tournament today. Even with a 65 you can't win it today. You can only probably lose it today, obviously.

"And I was very aware being a couple over through seven that things weren't – I didn't hit the panic button yet, but I reset just prior to that and thought if I can get myself back around even par, you know, that would be a good day's work.

"So obviously the eagle, boom, straight back in there, and I guess almost just piggybacking with a birdie straightaway at number nine, suddenly I turned in one under, and I could feel like I could actually leave the front nine behind as a job well done and kind of move to the back nine and try and build a score.

"From that point on I kind of was aware that the lead was only three, and if I played a decent back nine it was basically a very good day's work. And then I just got on a great run and was just trying to stay out of my own way and just try to get it to the clubhouse and keep doing what I was doing."

Rose, the 2013 U.S. Open champion, said his putting was key to his incredible round.

"I putted the ball beautifully and read the greens unbelievably well. If you had said to me walking up the eighth hole, I'd have said no chance, this course is playing a little too tricky for that," he said.

"But it's incredible. It's a good reminder that you just never know what can happen out there, just to stick with it on the golf course."

Rose is four strokes clear of Brian Harman and Hideki Matsuyama.