Allen finishes it off with another huge strike! This is tossed up on the stumps. Allen gets low and clobbers this high into the night, over cow corner to seal the match and the series. That's not as big as the others, but it's massive nonetheless.
That's it from us folks. The T20 series is done. All three games were interesting, but WI's T20 nous and batting power triumphed over Sri Lanka's spin-bowling nous in the end. Join us again in a couple of days for the ODIs - the first one kicks off on Wednesday.
Fabian Allen is player of the match for his 1 for 13 with the ball, and 21 not out off 6 with the bat: "I prepare for everything, including bowling in the Powerplay. I just backed myself and executed. The pitch is very slow, so I just needed to execute my plans. When I look in the dressing room we have a lot of batting power. I told Jason Holder that I'm not comfortable batting against Hasaranga, so I told him to bat him out and I'll be finishing. I just backed myself in the end. It was a good performance overall."
A little heartbreak for Sri Lanka, who fought hard with the ball after a terrible first 10 overs with the bat. But what a batting line-up this West Indies side has. They can six-hit their way out of almost any situation. Fabian Allen - their No. 9 - was the guy who struck the decisive sixes today, but you look up and down that order, and feel a match-winning innings can come from anywhere.
It's been a slightly dramatic chase, but Sri Lanka lost this in the first 10 - they were 4 for 46 in the 10th over, and although Bandara and Chandimal put on 85 together, they needed another 15-20 to make things difficult for West Indies. Akila Dananjaya having an off night didn't help either.
tossed up on the stumps, almost a full toss, driven to long on. West Indies don't need to be ambitious now
shortish wide ball outside off. Allen reaches for this and slaps this to the cover sweeper
Dananjaya is a bit rattled here, and he sends down a gift to Allen - a full toss at about shin-height on leg stump. Exactly the ball he would have wanted. He doesn't miss out. It's another huuuuuge six over deep midwicket. the roof is taking a battering
googly I think, floated up on to the pads. Allen aims a big heave but it takes the outside edge and goes skimming off towards short third man
That has gone miiiiiiiiiles. It's been an off-night for Dananjaya, and this is a terrible way to start this over. This is a shortish ball on the legs. Allen gets back and absolutely lays into it, sending it high over deep square leg for six. That's on the roof!
Akila Dananjaya to bowl the second-to last over.
Another great spell from Hasaranga, but that no-ball and the six it allowed Holder to hit has meant that West Indies are still very much within striking distance
googly I think, but Holder's back in the crease waiting for it. He blocks it out
tossed up this time, a big-turning leggie, which pitches outside off and turns away from Holder's forward defence
legbreak again, not turning a lot, defended back to the bowler
oh dear, Hasaranga has bowled so well, but this could be a big moment. This is a flattish legbreak wide of off stump. Holder clears the front leg and swings it high over long on for six
Free hit coming up.
legbreak, floated up outside off, and Holder gets forward to defend. But it's a no ball.
leg break again, shortish again, hit to long on, and they are turning down the single again
bit of a loosener to start. Shortish ball pitched outside off and it's hit to long off. What's this? Holder isn't trusting Allen with the strike. He turns down the single.
Allen and Holder are very capable of doing this. But they have to get through Hasaranga, who's bowling his last now.
Superb comeback from Sandakan that over, after being hit for six early on.
oof, googly again. This is pitching on about leg stump, and is bowled very slowly. Turns away from Allen, who gets back and blocks it
Fabian Allen is in. Hat-trick ball.
two in two for Sandakan! He tosses one up outside the leg stump to Bravo to start with, and it's the googly, so while it's pitched way outside leg, it's coming back into the stumps. Bravo gets down to paddle sweep it, but the googly has bounced a bit and it takes the top edge and floats out to short fine leg where a simple catch is taken.
Dwayne Bravo is in for West Indies.
gone now. Whenever West Indies get themselves some breathing room, Sri Lanka keep pulling themselves back into it. This is another slider, which Powell goes back to again and makes a mess of. It skids into the top of the off stump and Sandakan has responded strongly to that big shot.
Powell's taken a risk and it's paid off. He rocks way back into his crease and turns a fullish delivery into a shortish one, and pounds it over long on. The fielder thought he was in the game but that's over his head. Didn't time it perfectly, but got it well enough
tossed up, pitching outside off, driven hard down the ground, but Thisara Perera is there at long off to keep it to one
slider to start, angled across the right-hander and keeps going with the arm. Holder prods at it and misses
After a long discussion, Sandakan is given the 17th over
just about keeps it out. A flattish legbreak pitching on the stumps and heading towards off. Blocked back down the pitch