New Zealand beat Bangladesh by eight wickets to maintain 100% start
Williamson retires hurt on 78 after blow to thumb in first match after seven months out with knee injury
Mitchell hits superb 89 not out off 67 balls as NZ win with 7.1 overs to spare
Bangladesh post 245-9 after Mushfiqur hits 66 off 75
Ferguson takes 3-49, while Boult & Henry strike twice each
Tanzid c Conway b Ferguson 16 (Ban 40-2)
Lockie Ferguson changes to round the wicket and the change of angle does for the left-handed Tanzid Hasan.
The Bangladesh batter gets a relative freebie on his legs from Ferguson but clips it straight into the hands of the grateful Devon Conway at square leg.
A bit of a soft dismissal, in all honesty.
Change of bowling from New Zealand skipper Kane Williamson as Matt Henry is pulled from the attack
Lockie Ferguson, who has a penchant for black bowling boots, is bustling into the crease.
His third delivery is a no-ball as he oversteps but Tanzid Hasan unable to profit from the free hit that follows.
Michael Vaughan
Former England captain on BBC Test Match Special
I think Bangladesh have steadied the ship. Playing nice and controlled, the key is for one of these two - if not both - to get a big score. If they can get to 270 or 300, with the spinners they have, it will be a difficult chase for New Zealand.
Trent Boult, who you may recall gave up a central contract with New Zealand to play more franchise cricket and spend time with his family, into another over for the Black Caps.
It's a testing one as he mixes up his lengths to Mehidy Miraz, who eventually picks up a single off the last ball through third.
New Zealand captain Kane Williamson, white sunblock on his lips, chews the fat with Matt Henry before his third over.
The Kiwi seamer starts with three dots - two defended then a bouncer which Mehidy Miraz ducks out of the way of.
Henry's fourth ball takes Mehidy on to the back foot and he jabs it for three runs in the point region. Devon Conway with a brilliant dive on the rope to save four.
The left-handed Tanzid Hasan punches the penultimate ball of the over to the fence. Minimal effort in the shot - all timing.
Andy Zaltzman
Cricket statistician on Test Match Special
We've seen teams be relatively cautious at the top of the innings to preserve wickets for later on. 30-1 is the highest score after five overs in this tournament.
Michael Vaughan
Former England captain on BBC Test Match Special
I think this is clever thinking. The previous ball was a bouncer, so he moved to meet that length ball. Bangladesh are just getting going.
A hook from Tanzid Hasan to a short ball from Trent Boult and he gets lucky with a top edge which flies over the head of wicketekeepr Tom Latham and races away for four.
A couple of balls later and Hasan skips down the pitch and chips it over the head of the letf-arm seamer for a more conventional boundary.
Andy Zaltzman
Cricket statistician on Test Match Special
Litton Das is the first player to be out for a golden duck from the first ball of an innings in an international on their birthday.
Here's that incredible start to the game after Litton Das, on his birthday no less, found Matt Henry down at fine leg.
Trent Boult with a grin like a Cheshire cat. Or whatever the Kiwi equivalent is.
Mehidy Miraz flashes at a wide delivery from Trent Boult which beats the dive of Daryl Mitchell, stationed in a wide second slip position, and Bangladesh pick up four more.
Runs a little bit easier to come by off this pitch than in the match between India and Australia in Chennai last Sunday.
Good luck getting a question in there, Matt.
An elegant shot on the up from Mehidy Miraz who stands tall to the fourth ball from the other Matt Henry and threads it beautifully beyond point for four.
Matthew Henry
BBC Sport in Ahmedabad
Meanwhile in Ahmedabad…
Is there a big game on tomorrow?
Tanzid Hasan picks up a boundary when he cashes in on a slightly full ball from Trent Boult which he nudges behind Tom Latham behind the stumps.
Aatif Nawaz
BBC Test Match Special commentator
It certainly wasn't the most beautiful ball that Trent Boult's ever bowled! But what game awareness from New Zealand.
Andy Zaltzman
Cricket statistician on Test Match Special
I make that the sixth time that an opener has been out to the first ball of a World Cup match.
Das c Henry b Boult 0 (Ban 0-1)
What a start! A wicket off the very first ball as Litton Das goes for a diamond duck.
Das shuffled down the pitch and tried to make a statement of intent against Trent Boult but flicks it fine into the hands of Matt Henry.
Right, Trent Boult has the ball in hand at the top of his mark. Litton Das is on strike.
Play.
Bangladesh captain Shakib Al Hasan: "I was confused what to do if we won the toss so don't mind batting first. It looks a good wicket, and the ball will come onto the bat nicely."
New Zealand skipper Kane Williamson: "There's some potential dew around, so we'll try to make first use. I doubted a lot of the time whether I would be back so it's good to be here after a lot of family time."