Shakib & Mahmudullah share record 224-run partnership
They combined with Bangladesh at 33-4
Both men complete centuries
NZ fell from 152-2 in 30th over to 265-8
Mosaddek took 3-13, Taskin 2-43
Taylor top-scored with 63, Williamson 57
Highlights on BBC Two at 23:50 BST (UK only)
Vic Marks
Ex-England spinner on BBC Test Match Special
He expended quite a lot of effort there but it went straight up in the air. It wasn't the most fluent of innings. It hit the bottom of the bat. Are the Kiwis not batting very well or is it not a very good pitch? It kept low.
Broom c Tamim b Mosaddek 36 (NZ 228-5)
Every time New Zealand begin to go through the gears, they start to splutter and jerk like an ageing engine. Neil Broom tries to - let's be honest - slog Mosaddek and the ball squirts off the bottom of the bat, high into the air and is safely caught by Tamim at backward point.
New Zealand's middle order has also lost Grant Elliott since the last World Cup. He was an unsung hero of sorts - and that six he nailed to get the Kiwis over the line in the semi-final will live long in the memory. Neesham is the man tasked with replacing him as a seam-up all-rounder and a pull to the boundary is followed by a straight-drive for four.
Vic Marks
Ex-England spinner on BBC Test Match Special
After the 30th over, New Zealand were 152-3 and it wasn't long after that Williamson was run out. That is an indication that he felt they needed to up the rate.
It is clearly one of Williamson's flaws - running between the wicket. He is not alone in being a meticulous batsman who, when running between the wicket, it all goes out the window.
Run-rate 5.14
Mosaddek is brought on for a bowl and his first delivery almost castles Jimmy Neesham who is surprised by a 60mph off-break. Quite quick, that is. Five singles follow. Not enough at this stage.
Charles Dagnall
BBC Test Match Special
These two or three overs are likely to be the difference between New Zealand scoring 230 and 270.
A colleague of mine - Phil Dawkes - has suggested New Zealand have lost their edge and fearlessness since Brendon McCullum retired. I tend to agree. While I rate Kane Williamson as an incredible batsman and even as a captain, perhaps his more studious persona is making his team responsible but less attacking. Jimmy Neesham is off the mark with a four. Nine overs left for the Kiwis to post a challenging total.
This is the wicket which could cost New Zealand a total of 300. Taskin was just too good for Ross Taylor.
Broom 29, Neesham 0
Neil Broom appears suspicious of a Mustafizur delivery which pops ever so slightly. He uncomfortably dabs it into the leg side then nervously shuffles down the other end in the manner of somebody who's running to the bathroom in the middle of the night - looking over his shoulder, ever-so-slightly ponderous.
Taskin 8-0-43-2
I'm calling it. Bangladesh will win from here.
Ebony Rainford-Brent
Ex-England batter on BBC Test Match Special
That was very well set up by Taskin. He went for a ramp but didn't get enough contact. This wicket could just bring things back into Bangladesh's favour.
Taylor c Mustafizur b Taskin 63 (NZ 201-4)
Another big, potentially-decisive blow is administered by Bangladesh. Ross Taylor, one delivery after failing to connect with a hook shot, tries to ramp Taskin round the corner and the ball flies into the air before landing into the clasped hands of a diving Mustafizur at short fine-leg.
Mustafizur 7-0-43-0
Mustafizur has enjoyed a whirlwind couple of years since bursting onto the scene in 2015. Just 21, he's already played in four domestic competitions - including the IPL and in county cricket for Sussex - and he's got 82 wickets in all formats for his country. Despite that, however, he has never reached double figures with the bat for the Tigers. We can probably summise he's not going to be the one to see Bangladesh to their target today. His latest over is tidy, just five singles from it.
Ebony Rainford-Brent
Ex-England batter on BBC Test Match Special
This is lining up nicely here. NZ could get to 200 around the 38th or 29th over. With wickets in hand you can go at 10s. You usually get a big over of 16, 17, etc, but if they can balance out at 10s they can get themselves to 300.
Taskin has done a good job but it is one of those wickets where unless you are bang on it, good players will find a way to move it around and score.
Taylor 58, Broom 25
Neil Broom might be a new name to many of you - me included - but he's been around the block. He's 33 and his younger brother, Darren, is already retired from first-class cricket. He can clearly play though as he cuts Taskin through point for four. Ross Taylor weighs in with a lofted boundary back down the ground.
Ebony Rainford-Brent
Ex-England batter on BBC Test Match Special
I was expecting a few bigger scores, around the 350 mark. Seeing the way Sri Lanka chased down India's score withe ease, if a team does decide to go big and attack a team then 300 is not enough. You want to be aiming for 340 to give yourself that cushion.
Run-rate 5.03
Mustafizur - a rookie at 21 - bounds in with the enthusiasm of a young puppy before delivering a decent yorker which is dug out by Neil Broom. Going through his later overs repertoire, he delivers wide of the crease to Ross Taylor who reaches for it and pushes two into the off side.
Taylor 51, Broom 18
Taskin is bowling at decent speeds in this match - 86-87mph - and there's a sense he can go even faster as he develops. His extra bounce is utilised by the batsmen who help the odd single round the corner.
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NZ 175-3
Ross Taylor notches another international half-century - the 37th of his one-day career - with a dab down to third man. The milestone comes off 67 balls. Time to open those shoulders now though.