Bubba with his birdie effort...12 foot maybe... relatively straight... and it's in. Pressure all on Spieth to save par.
If he misses, it's a dramatic two-shot swing to Watson.
He misses. Bubba is turning the screw and for the moment, the young man has no answers. Watson eight under after nine, Spieth six under.
Right folks it seems appropriate after nine holes on day four that our focus shift to Spieth and Watson. Not exclusively you understand but unless someone from the pack can produce a surge, it looks like our champion is one of these two.
McIlroy finished by the way, three under for the day and evens for the tournament. Not exactly a happy bunny in his post-match interview.
It's easy to get carried with precocious, young but we shall really see what Spieth is made of on these back nine. Bubba has hunted him down clinically and having won the tournament two years ago, he's the one who knows exactly how to get over the line.
Watson's second on 10 worries the crowd but rather than disappear into the massed ranks of spectators near the green, it bounces back out and he enjoys a partial reprieve. Par at best though. Spieth replies with a push right straight into the bunker.
Anyone flagging yet? I hear espresso martinis are jolly nice, not that I'd be so unprofessional to indulge just yet...
Spieth plays a blinder out of the bunker to within 12 feet and in hindsight hitting the sand wasn't so bad. Watson's chip races past the pin and keeps on going...
Watson goes close with his putt but it's still a dropped shot. Spieth pounces with a successful putt and he reduces the arrears to one.
You suspect the young man needed that fillip after the battering he'd been subjected to by Watson in the last 20 minutes. The ship has been steadied but can he now unfurl the main sail and plough on through the waves?
OK, Kuchar birdies 11 and demands we do not forget him as he moves to four under *rumours of his demise have been greatly exaggerated*
Spieth's second safely on the green and then rolls kindly to within 18 feet. Bubba belts out another boomer but is far out than his playing partner and will putt first
Watson gets it close enough to all but guarantee par. Can Spieth take advantage? He takes his time assessing the curves of the green but he doesn't read them accurately enough and misses. Bubba gives him par and then sinks his own par putt.
Seven holes to play and Watson is sitting on a slender, precarious one shot lead.
Spieth off the tee first and plays an ambitious shot that hits he up slope, rolls rapidly down the hill and ends up in the water. A massive mistake there. Bubba plays it safe, it flies over the flag but his ball is dry.
Defending champion Adam Scott finished. Evens for today and one over for the tournament *respectable defence*
Spieth pitching for his third shot, short range over the water. He simply has to get it on the green... and does. Great shot and great chance of escaping with just one dropped shot.
Bubba gets his delicate chip over the brow, onto the green and within four foot. He's in the driving seat now.
Fair play young man. Spieth gets up and down for a bogey but it could have been a lot, lot worse. Bubba though keeps his considerable cool to sink his par putt and he's two shots clear.
Par five 13th and it should favour a big-hitting chap called Watson. Yep, he's hit an absolute monster from the tee. Young Spieth is in the trees!
Word up, we have a new contender. Blixt birdies 13 and moves to five under, level with Spieth and two adrift of Watson. Who said two-horse race?
Spieth can get out of the trees but in all depends on the lie. He hacks it out onto the fairway and he's back in business but still behind Bubba's initial drive.
Leading pair on the 14th. Both make the green in two but it is Bubba with the closer shot. He has the look of a man moving in for the kill.