Image source, Getty Images

It was not until the 67th Masters, in 2003, that the first left-hander got to wear the Green Jacket - Canada's Mike Weir.

If Bubba Watson goes on to complete victory tonight, six of the last 12 champions will have been left-handed.

Ryder Cup god Ian Poulter, external on Twitter: "Beyond disgusted with my performance on the par 5's for the week. The simple facts on winning a green jacket is you have to play them well.

"I have to say Augusta National was very playable today. They actually softened the greens & slowed them down slightly. Disappointing finish."

Jordan Spieth runs it close with his putt on the 13th, trickling just past the left edge. Watson with the chance to hammer a nail in the opposition coffin. Birdie putt just wide of the drop. Both make the routine par returns, but time is running out for the rest to catch Bubba.

Jonas Blixt puts it all on the line as he attempts to shut the gap on Bubba Watson. Massive hooked iron round the trees, but it squirms out the back of the green and he will be in trouble trying to save par there.

Jordan Spieth lets the club slip through his grasp after hitting his second on 14. He looks disgusted with that. The length is perfect, but the line is wide. He will have a good 30 feet downhill to try and digest when he gets up on the green.

Bubba Watson has the wind in his sails. Another superb approach, helped by the extra distance on his drives, leaves him with ten feet.

Jonnie Horden:, external Apparently the longest drive recorded was 515 yards - set by Mike Austin in 1974 ... using a wooden club. So much for titanium!

Down a hill, onto concrete and with a gale at his back though.

Par four, 440 yards

The only bunkerless hole on the course, but danger comes in the shape of a contoured green. If the drive is well-placed, then a mid-iron approach may be all that is needed. However, the significant left-to-right drop of the putting surface can lead to three putts, even from close range.

2013 average: 4.10 Rank: 12

Image source, Getty Images

That whipcrack driving from Bubba Watson has taken him eight under for the par fives this week. Rory McIlroy is right to rue his own level-par performance over the longer holes.

Rory McIlroy on Twitter, external: Not the week I wanted but know what I need to do next year. Even par for the par 5's wasn't good enough! Can't wait for 2015!

Bubba Watson's crash-bang drive proved the difference in the end. Even with his ordinary apporach, he had enough yardage in hand and his birdie putt slips down with ease.

Three shots to the good and five holes left to play.

Bubba Watson has an assault course to pick his way through on the 13th green and he has left his third shot a good five feet short. Still some work to do to take a birdie and open up a three-shot lead.

Speith has already departed the green with his par.

Lee Westwood taps in for a birdie on 15 after a pinpoint wedge. Back to one under he goes.

-7 B Watson (US) after 12; -5 Blixt (Swe) 13, Spieth (US) 12; -4 Kuchar (US) 13; -3 Jimenez (Spa) 14

Selected others: E McIlroy (NI) F, Rose (Eng) 15, Westwood (Eng) 14; +1 Donaldson (Wal) F, Scott (Aus) F; +2 Poulter (Eng) 13; +6 Gallacher (Sco) F +9 Clarke (NI) F, Lyle (Sco) F

Jordan Spieth is dragging this 13th hole back his way. His third is up to within 15 feet while Bubba Watson follows up his cracking drive with an approach that rolls up onto the back bank.

Iain Carter
BBC golf correspondent

"My mind is wondering to Rory McIlroy in 2011 when he had the lead going into the 10th. I am not suggesting the wheels are coming off at that rate for Jordon Spieth, but they are both of a similar age at this stage."

European Tour golfer and 2008 Open leading amateur Chris Wood:, external Probably the best drive you'll ever see.

And the PGA Tour, external chimed in with this: We have to measure that Bubba Watson drive at 13 in furlongs. Check back in a bit.

Jordan Spieth fires his second shot out through a corridor of trees and is finally almost level with Bubba Watson's drive which has weighed in at colossal 366 yards.

Image source, AFP

Miguel Angel Jimenez is also on the move. A birdie on 14 move him up to three under.

Jonas Blixt is ghosting up the leaderboard. The Swede birdies the 15th to move on up to five under and level with Jordan Spieth in second spot..

Iain Carter
BBC golf correspondent

On Jordan Spieth: "At the start of 2013 he was outside the world's top 800, he's now 13th and he'll be comfortably into the top ten after this week and he's had four top tens already this year. This is someone of very tender years. We've talked about how excited we've been about Rory McIlroy and rightly so, he has two majors and is 24, but this guy is doing stuff which is almost akin to how Tiger Woods burst onto the scene. I still think Woods edges it but there is no doubt, Jordan Spieth is the future of American golf."