Australian Cameron Smith wins title and $3.6m - the largest prize in golf
Leaderboard: -13 C Smith (Aus); -12 A Lahiri (Ind); -11 P Casey (Eng)
Norway's Victor Hovland makes a hole-in-one at the par-three eighth, a day after Ireland's Shane Lowry cards one at the iconic par-three 17th
Use audio icon to listen to BBC Radio 5 Live Sports Extra commentary
Peter Scrivener
BBC Sport at TPC Sawgrass
Here we go then. The final three holes and what a three holes.
The par-five 16th and its risk and reward second shot, followed by the hole we all want to play, the island green 17th with the thousands of fans in its amphitheatre.
And then 18 with water all down the left waiting for the slightest nervy swing.
This is a long way from over!
Casey -11, Smith -13 (15)
Honours even. Cam Smith plays a wonderful shot to splash out of the sand and then knocks in his putt to save par.
Casey, whose short game has been pretty much keeping him in this is a little heavy handed with his chip but saves par, with a tricky putt down the slope.
Casey -11, Smith -13 (14)
Paul Casey and Cameron Smith don't cover themselves in glory off the tee.
Casey is left a blind shot to the green after a horrible drive right, and is far worse off than Smith, who has an angle and decent lie in the pines.
The Englishman does well to smash it out of the long stuff to reach the edge of the 15th green. Smith sends his second into the left-side bunker...
Peter Scrivener
BBC Sport at TPC Sawgrass
Cam Smith tagged a youngster with his wild drive. A ball is handed to lad before Smith gets a marker from his bag and signs his cap too.
Bradley -12 (16)
Keegan Bradley is well up for this. Look at the concentration as he takes on a 50-foot eagle putt.
His ball ends up close enough to present him with a simple birdie chance to move a stroke behind Cameron Smith.
Casey -11, Smith -13 (14)
Even when Cameron Smith looks to be in a spot of bother he ends up not being. He drains a 12 footer for par.
Peter Scrivener
BBC Sport at TPC Sawgrass
Not many people are sticking around to watch the last group out on the course.
The fans are several deep round the 14th green.
And those following Cam Smith are relentlessly positive, even after the chunked chip.
His back nine is a copy of his front nine. Four birdies followed by a par.
Casey is hanging in there.
#bbcgolf
Andrew: After being the nearly man for so many years, Paul Casey has a real chance of a career-defining win.
He's got a fair bit to do Andrew.
Kizzire -5 (F*)
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
Peter Scrivener
BBC Sport at TPC Sawgrass
Food time for Casey as he strides down 14. I wonder what the sandwich of choice is?
Foil unwrapped and he takes a large bite.
The weather has brightened again. The sunshine beating down and it’s once again perfect golfing conditions.
Scratch that last headline. Tyrrell Hatton comes up short on the 17th and sees his ball splash into the lake.
Hatton -9 (16)
Tyrrell Hatton has an eagle putt from another zip code over on the 16th.
This is 60 feet territory and there's nowhere near enough clout behind that as it pulls up six feet short. Can he rally to make birdie. Yep. Never in doutbt.
Bradley -11 (15)
Keegan Bradley is not going anywhere. He responds to news of Cam Smith's birdie by making one of his one on the 15th to move level with Paul Casey.
Peter Scrivener
BBC Sport at TPC Sawgrass
This is getting like heavyweight boxers trading blows and the crowd are loving it.
But Smith and Casey, striding down the 13th, are chatting like it’s a Monday morning roll-up.
Smith with the first blow on 13. Casey’s response is weak.
Casey -12, Smith -13 (13)
Cameron Smith's first 12 holes in the final round...
Birdie, birdie, birdie, par, birdie, birdie, bogey, bogey bogey, birdie, birdie, birdie.
And he might need another on the 13th with Paul Casey looping his tee shot to 11 feet, just inside Cameron Smith's marker.
He nails it, while Casey leaves his short.
-12 Smith
-11 Casey, Lahiri
-10 Bradley
-8 Hovland, Hatton
Selected others
-7 Straka, Kisner, Knox, Lowry, Munoz
-5 Fleetwood
-4 Garcia, Johnson,
-3 Poulter, Power (F*), Thomas
-2 McIIroy
Casey -11, Smith -12 (12)
Talk about drama....Paul Casey finds the heart of the cup from 13 feet to move to 11 under over on the 12th green.
but now it is Cam Smith's turn to get his putter out, carding a birdie to regain the lead. The Australian is matching his peers blow-for-blow.
This is compelling golf.
Lahiri -11 (11)
Anirban Lahiri gets a huge cheer as he strolls up the 11th but can he convert this golden chance courtesy of a unbelievable iron shot into 14 feet.
Eagle putt incoming. In it goes.
Right. Back. In. It.
Hovland -8 (16)
Viktor Hovland needs to make this birdie putt from 11 feet. But despite the shout of encouragement it slides away from its intended destination.
He needs something special now over the final three holes.
Bradley -10 (13)
Over on the 14th Keegan Bradley takes drills his second towards the green. For a minute it looks like it's going to skip on but it stops short on the edge of the green.
Par at best.