Blackcaps vs Bangladesh: Martin Guptill finding form with World Cup approaching

Blackcaps opener Martin Guptill feels like he's returning to his old self after back-to-back centuries against Bangladesh in their one-day international series.

Fresh from a patient unbeaten 117 off 116 balls in Napier, Guptill went one better on Saturday, eventually holing out for 118 after cracking 14 fours and four sixes during his 88-ball stay.

His 143-run partnership with captain Kane Williamson helped steer New Zealand to an eight-wicket win in the second ODI in Christchurch with 83 balls to spare.

Guptill is pleased he's finding form with the Cricket World Cup quickly approaching.

"[Saturday] felt a bit like the me of a couple of years ago, which is pleasing to be able to feel that and hopefully I can just keep pushing on from here," Guptill said.

"I went away [after the Indian series] and had a look at some footage and found a couple of things to work on, and made sure I drilled those in while I was at home and came back - and so far it's working."

Despite registering a comfortable win, the Blackcaps had some troubles in the field with four dropped catches. Guptill said the team plans to work on their fielding ahead of the third ODI on Wednesday.

"No one ever wants to drop a catch, and no-one ever goes out setting out to do that.

"You have those days sometimes. It was quite gloomy [on Saturday morning], and we'll work on that over the next couple of days.

"It was just one of those days."

Colin Munro will come into the side for the third ODI with Williamson being rested ahead of the test series which starts on February 28.

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Join us at 11am Wednesday for live updates of the Blackcaps vs Bangladesh ODI at Dunedin