Managing the inevitable highs and lows of tournament play has been identified as crucial by New Zealand if they are to go deep into the World Cup play-offs.

The Black Caps face Sri Lanka in the opener at Hagley Oval on Saturday, ending a drawn-out buildup for the co-hosts, whose compelling form suggests they can challenge for their first world crown.

Captain Brendon McCullum’s team have won 15 of 22 completed one-day internationals since the start of 2014 but he admits none have carried the pressure he expects over the next six weeks.

He says his players and management have spoken at length about the need to remain calm, regardless of individual form or the team state of play going into their six pool games and, most probably, the knockout phase.

Their composure levels will be tested after Saturday’s encounter.

Beat a strong Sri Lankan side and the Black Caps can expect interest and support to intensify.

Lose and they will sense considerable public deflation.

“We’ll try to maintain a real stable environment,” McCullum said.

“You’re not always going to get runs and wickets – it’s about maintaining that maturity.

“The game has its ups and downs anyway without us adding our own ups and downs.”

Sri Lanka captain Angelo Mathews says his team will be out to ruffle feathers as much as possible to knock New Zealand off their winning stride.

However, he suspects the Black Caps won’t let the occasion get to them.

“Playing at home always adds that bit more pressure. But I think they’re a very good team to handle that,” Mathews said.