"Ohhh Jordan, not that mistake. Lucky, lucky."

He's so lucky. Spieth talks his ball into going where he wants to go from the 17th tee. That's the fairway.

Mickey Wallis: The precision of Spieth when he’s in this mood is incredible to watch. 13, 14, 15 & 16 just scintillating iron/wedge play..

Birdie putt for Louis Oosthuizen on the 16th... it's about 30 foot away though. Canned it! If that didn't hit the hole it might have ran through to the water...

Jordan Spieth follows with a much closer look at the hole... he doesn't miss those. Especially not today. That's his fourth birdie in a row, he's two clear.

Image source, Getty Images

The birdies are rolling in for Rickie Fowler. He rolls in a 10-footer on 17th - that's his third on the bounce - to move within striking distance alongside his playing partners Mickelson and Kuchar.

Image source, Getty Images

Rory McIlroy's two-putt from the right edge on 16 even has renowned Butch Harmon purring. McIlroy knocks his lengthy opening putt about eight feet past, confidently completing the job with the second.

Playing partner Jon Rahm isn't faring as well, though. The Spanish world number three lumps his tee shot into the wet stuff, walking off with a five.

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Tony Finau looks set to lie second overnight but he conceded he was lucky to be playing following his "freaky incident" where he dislocated his ankle after holing a tee shot in Wednesday's par-three contest.

"I went a little over the top with the celebration and it was kind of a scary moment when I went over on my ankle but i was able to pop it back in to place," he told Sky Sports.

"I didn't sleep very much last night but from that point to where I stand today is nothing short of a miracle.

"I couldn't put as much weight on it as I wanted but I tried to not think about it. I just tried to play and I was happy with my round.

"Before i teed off I said to myself this is my first Masters, let's have some fun because I didn't know if that was going to be the case last night."

Andrew Magee
American PGA Tour winner on BBC Radio 5 live sports extra

Spieth has such a plan of attack and it looks like it's coming together in these last two weeks, perfect timing for the Masters.

Image source, Reuters

Everyone wishing* they had lumped a fiver on Jordan Spieth leading after round one? The 2015 champion knocks in that birdie putt to take the outright lead.

* or feeling smug if you have lumped a fiver on him

Shaun Micheel
2003 US PGA Championship winner, BBC Radio 5 live

Much like Tiger didn't take advantage of the par fives, Jordan has played the par fives in five under, six shots different. That's huge at an event like this.

Dustin Johnson converted that birdie chance on the 14th, then follows that up with a peach of a drive on 15th. Justin Rose can't say the same, however, hanging his drive out left and dropping his club on the tee box in frustration.

Rory McIlroy jumps into that pack tied on three under behind Jordan Spieth and Tony Finau with a birdie on the 15th, then he miscues his tee shot on the 16th. The Northern Irishman is clinging on to the right edge of the green and left with a monster putt...

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Jordan Spieth is flying. He lays up on the 15th then knocks on, with a touch of backspin, to four foot. Ball on a string. A downward lie into a green above you, with that bank back into the water that did for Sergio, that isn't easy.

A putt for the outright lead awaits....

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Andrew Magee
American PGA Tour winner on BBC Radio 5 live sports extra

Mickelson two under and McIlroy three under. Earlier we were asking if we lost Sergio would the tournament be ok? I think it's in great shape right now.

You could put a picnic blanket over these three balls. Fowler to go first... nails it. Next up is Lefty...job done. Don't let the patrons down Kuch... not a chance. Twos and high fives all round. Kuchar, still to win a major, is a shot off the lead.

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Listen back to BBC Radio 5 live commentator John Murray as he expertly takes us through the emotions of Sergio Garcia's 13 on the 15th hole.

You guys! Matt Kuchar knocks his tee-shot on the 16th to within five foot... murmurings of excitement turn into whoops when Phil Mickelson puts his almost equidistant. Then guess what? Yep, Rickie Fowler does the same. Remarkable.

No wonder there are three beaming smiles on their faces as they march shoulder-to-shoulder to the green.

Jordan Spieth could be out in front on his lonesome in a few moments. That's because Tony Finau has a testing 13-foot back on the last for a par...

Nope, he's only gone and rattled it in! What a day, what a 24 hours, for the American debutant. Dislocating his ankle, popping it back in, then going out and ripping up Augusta with a swollen joint. Incredible.

Dom Mathias: It's getting to the point where you think Jordan Spieth saying "Goshdarnit" after every shot when it lands within ten feet is simply stage management/PR tactics

We have another leader. And it's someone who knows all about winning that Green Jacket. Jordan Spieth is having a stunning spell, successive birdies putting him up alongside Tony Finau.

Elsewhere, Rickie Fowler birdies the 15th to move back to even par, while Dustin Johnson knocks a mid-iron to within a few feet a hole back.

Image source, Getty Images

First sign of tension from Tony Finau? With a short wedge in hand, he pulls his approach on the last, ball hopping off the bank and stopping just short of the patrons. Not catastrophic but not ideal when he would have had thoughts of a birdie tweeting in his mind.