Southee into his fifth over, the outfield's quick and he needs to keep his line tight as Nawroz helps one off his legs for four. A single takes him to 14.

Kalika Mehta
BBC Sport in Napier

"There was an audible groan around the ground after Afghanistan won the toss and chose to bowl. The home crowd, wearing their orange target T-shirts, had been flooding wanting to see their captain and team smash the ball to all corners of McLean Park and hoping to claim a one-handed catch that will put them in a pot to win a share of $1,000,000 if New Zealand reach the final.

"Still with the sun shining and a few boundaries coming, the crowd are on their feet. Some people's thoughts have strayed from the cricket though, one couple are thinking they might be able to get away in time to go and see the Art Deco. It's not a bad plan."

Samiullah Shenwari, one of Afghanistan's batting heroes in their thrilling win against Scotland, is the next man to the middle. He's another of the original members of this team who started their World Cup odyssey trying to qualify for the last tournament (as immortalised in the excellent documentary "Out of the Ashes"), and has only missed out of their first 49 ODIs before today. He's under way with a square drive for four.

Derek Stirling
Ex-New Zealand seamer on BBC Test Match Special

"That's very disappointing for Afghanistan - it was a strange shot. Stanikzai just gave catching practice to gully. There was no intent to go over the top or keep the ball on the ground. Afghanistan were looking quite good too, more settled and more positive."

Image source, Getty Images

Another one gone - Boult goes round the wicket and Stanikzai swats him straight to the safe hands of Guptill at gully.

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Derek Stirling
Ex-New Zealand seamer on BBC Test Match Special

"Afghanistan are starting to look more comfortable now and are starting to play some shots. Mangal particularly is starting to move quite nicely now."

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Nawroz likes a drive, that's why there's still two slips in, taking Southee for a two but not otherwise being able to get him off the square.

Stuart Duff
Ex-Central Districts all-rounder on BBC Test Match Special

"Has Nawroz Mangal not heard of Martin Guptill? The other batsman has - Stanikzai saw it was Guptill and told Mangal to get back quickly. But that would have been out if Guptill hit the stumps."

Not much to cheer so far for the Afghan fans, many of whom have their country's flag emblazoned on their cheeks. Nawroz rides his luck against Boult, swatting a four between the men leaping at gully and backward point. He then tentatively thinks of taking a quick single to Martin Guptill at backward point - you don't do that - and is lucky to survive when Guptill's throw only just misses the stumps, when he would have been out by a yard or two. Nawroz has seven from 16 balls, Stanikzai has nine from 16.

Southee lets one go against Stanikzai, an attempted hook brings him four over the slips. He's not afraid to take on the short ball, a pull shot brings him four more and we very nearly have a pitchside cameraman being taken out in a two-footed tackle as Grant Elliott slides, tries and fails to prevent the boundary.

Image source, Getty Images

Stuart Duff
Ex-Central Districts all-rounder on BBC Test Match Special

"Both batsmen are stuck on the crease, there is not much foot movement, forward or back. They are just staying on the crease and trying to prod."

Listen to TMS commentary via the audio icon or the "Live Coverage" tab.

The Black Caps' opening bowlers have changed ends as Vettori, having spun down a wicket maiden, is replaced by Boult, who was born in Rotorua and so far at this World Cup, has been as hot as the natural springs and mud pools of his home town. The third slip is moved to gully as Nawroz defends and misses. Another maiden over.

NB Vettori has 292 ODI wickets for New Zealand, and seven for the officially-sanctioned ICC World XI against Australia in 2005.

Right-hander Stanikzai drives and misses. New Zealand are buzzing.

It didn't need DRS technology to show that ball was clearly missing leg stump... so Stanikzai survives and we won't need to trouble Mr and Mrs Decision Review System for the rest of the innings.

Indeed, it's right-arm seamer Southee on from Boult's end, with the massed hordes of fans on the grassy bank behind him. Still three slips in. Nawroz is off the mark with a single, then there's an appeal for leg before against Stanikzai and New Zealand want a review...

Asghar Stanikzai, who's played 42 of Afghanistan's first 49 ODIs before today, is their number four today - and he's happy to defend a wicket maiden from Vettori, who we think may have come on so early in order to switch Southee to the other end in this stiff breeze.

Stuart Duff
Ex-Central Districts all-rounder on BBC Test Match Special

"Well, go McCullum and go Vettori! We thought it was a strange decision to bring on Vettori so early. It has not done a lot, it was a straight delivery but the batsmen was beaten on inside. He was not beaten by a ripping delivery, he played the wrong line.

"If it goes on like this then New Zealand won't have a lot to chase."

Image source, ALLSPORT

Image source, Getty Images

Left-arm spinner Daniel Vettori on - and he bowls teenager Usman Ghani first ball! The youngest player at this World Cup loses his off stump to one of the most experienced men in the tournament. What a sensational bowling change from McCullum.

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Pete Naylor: England might get a bit slaughtered by these two next summer. Southee and Boult are two very dangerous opening bowlers...

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