New Zealand won by eight wickets and went 1-0 up in the 1st ODI against Bangladesh in the Bangladesh tour of New Zealand at McLean Park, Napier.
Bangladesh were bowled out for 232 in 49th over as Mithun's 62 off 90 rescues Tigers in Napier.
Boult and Santner have picked up three wickets while the visitors were reeling at 94/6 before Mohammad Mithun's third ODI fifty kick-started a grand recovery against the host.
Mohammad Mithun scored 62 runs off 90 balls smashing five fours, rescuing Tigers from the deep danger in the soil of New Zealand.
New Zealand have scored 233 runs winning the game in 44.5 overs when Guptill gets his 15th ODI hundred.
Earlier, Bangladesh won the toss and opted to bat first as they chase a maiden victory over the Black Caps in the first one-day international in Napier.
The Bangladesh have never beaten the hosts in any format during four previous tours to New Zealand.
“Bangladesh batted a long way down and made life difficult at times even when you thought you are in a position of strength,” said Kane Williamson.
“It was tough. We were struggling with the bat, lost too many wickets at the start. There are no excuses. We need a week to adjust to the conditions, but I don't want to make any excuses. We will give our best in the next game," said Bangladesh’s Mashrafe Mortaza.
"I think batting is a concern, but at the same time the bowling also needs some work. We did not bowl badly today but 232 is hard to defend."