Rahm flirts with the water beside the 11th green after slightly overdrawing his approach, but it bounces safely on the fringe. Koepka takes a better line but comes up just short of the green.

Viktor Hovland misses the green on 12, then chips in for birdie to move back to five under par. Jason Day putts in nicely too, and he’s back to -4.

Koepka holes his putt and that is an exceptional par on 10, having been among the trees and forced to chip out. Rahm and Bennett par too.

-13 Koepka (10)

-11 Rahm (10)

-7 Cantlay (16)

-6 Bennett (a) (10)

Koepka chips out of trouble and then fires a mid-iron on to the green, leaving himself a putt of perhaps eight feet for par - that was solid play after a troublesome teeshot. Bennett comes up short and spins back off the green for the second hole in a row. Rahm next, from 156 yards: he makes the same mistake as Bennett, pitching the ball a foot from the flag before spinning back off the putting surface! Perhaps the cold air is reducing the distances here and catching them out. A good result for Koepka, all told.

Cantlay rolls in a delicate putt on 16 for back-to-back birdies and he moves to seven under.

Rahm has the honour once more and finds the fairway with his drive, but Koepka makes his first notable mistake of the day: he doesn’t get the required right-to-left turn with his three wood and leaves himself in some trouble among the trees on the far side of the fairway.

Rahm splashes out of the bunker and leaves himself another in the eight-foot range for par: for the third hole in a row he drains it! Phenomenal putting from Rahm so far today. Koepka chips on and putts from three feet for his par. Bennett does similarly, while Cantlay makes that birdie up on 15.

-13 Koepka

-6 Bennett (a), Cantlay

-5 Morikawa, Fitzpatrick

Patrick Cantlay, on five under, has just hit a beautiful swinging hook into the 15th green, landing within a few feet from 220 yards. He should move to six under.

Rahm finds a greenside bunker from the rough on nine, Bennett comes up short, and Koepka is so unlucky - he lands his ball over the flag but it spins back down off one of the most treacherous greens at Augusta and he’ll need to chip back on.

Rahm over-cuts his tee shot on nine and clips a tree but it falls fortuitously, landing on the long grass rather than the pinestraw. Koepka finds the middle of the fairway.

Sam Bennett, the amateur having the time of his life in this final group in his debut Masters, corrects his bogey on seven with a birdie at the eight after a well-judged 15-foot putt. Can Rahm follow? He can! Another wonderful putt and that’s back-to-back birdies by the Spaniard, who’s cooking this morning. Koepka rolls his in short putt to stay two ahead.

-13 Koepka

-6 Bennett (a)

-5 Morikawa, Cantlay

Rahm pitches to about eight feet, the ball checking on the turf and leaving him an uphill putt. Koepka’s response is beautiful, judging his little chip perfectly with a little sidespin to roll it close, and that will be a birdie.