While the rain continues, Graeme Swann on TMS has called for a switch to 40 overs rather than 50 for one-day cricket, to eliminate the occasional tedium of the middle overs.

With all this chat about four or five fielders outside the ring, and two new balls, what would be your formula for one-day cricket? Email, text or tweet us with your suggestions.

Allan Border
Ex-Australia captain on BBC Test Match Special

"I'd allow that fifth fielder out straight away, as now there's always a quadrant of the pitch you can't protect. I was speaking to Shane Warne, he thinks you should be able to set your field anywhere."

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Image source, Test Match Special

Graeme Swann
Ex-England spinner on BBC Test Match Special

"Reverse swing used to be a key part of one-day cricket but with two new balls, it's died a death as the ball doesn't get old enough."

Simon Mann
BBC Test Match Special

On Twitter:, external Just what NZ need with De Villiers on the charge, a breather.

Image source, Simon Mann

Graeme Swann
Ex-England spinner on BBC Test Match Special

"Brendon McCullum will be saying 'they have played well, but don't panic. Whatever score they post, we will chase it'. New Zealand will be a bit deflated after such a great start but it gives New Zealand the chance to get their heads up and for McCullum to give his side a pep talk."

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Two lots of covers now being stretched across Eden Park's drop-in pitch.

Graeme Swann
Ex-England spinner on BBC Test Match Special

"New Zealand will have wanted to go off so they can regroup in the dressing room. There are a few jeers and boos around the crowd. But the Kiwis that know their cricket will be quite happy."

An enormous green tractor brings on the covers - I'd imagine South Africa will be the more disappointed of the two sides that play has been interrupted.

Uh-oh. Umpires having a conference... and choose to stay on... and then change their minds and Ian Gould waves the players off.

Graeme Swann
Ex-England spinner on BBC Test Match Special

"There is some definite rain in the air. It is misty rain, rugby weather. But I can't see any dark grey clouds. South Africa will not want to lose a wicket if we are to have a rain delay."

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Stephan Shemilt
BBC Sport in Auckland

"Has Kane Williamson just dropped the World Cup? You certainly don't want to be giving De Villiers too many lives, not when the next three balls go for 14. 'He's not even trying to bat quickly,' says Neil Manthorp."

Anderson off, New Zealand's go-to man Trent Boult back on for his ninth over. TMS's Graeme Swann has noticed rain in the air - with Bryan Waddle mischievously suggesting that if it rains for two days, New Zealand would go through as (under competition rules) they finished higher in the group stage. For now, play continues and South Africa are closing on a century stand as De Villiers leans back to guide another four through third man, while taking singles at will. His pal Du Plessis joins in the fun with a well-timed four back past the non-striker.

Naveed Afzal: I seriously need to get a few hours of sleep but it's the ABDV show. WHAT A PLAYER. Faf has been brilliant minus that poor call.

Bouncer from Southee, a top edge from De Villiers but the luck is with him as the ball skies over mid-wicket and it falls safely between two onrushing fielders.

Graeme Swann
Ex-England spinner on BBC Test Match Special

"It will be interesting to see how New Zealand go as they are yet to be tested against a team that is set to make 300 or 350."

...but it's not out - a rather needless referral as De Villiers was nearly past the stumps.

New Zealand turn back to Tim Southee, and one of those trademark delicate-dabs-to-third-man from De Villiers brings up the 200 for South Africa. A quick single requires a trip upstairs to the third umpire as a direct hit dislodges one of those flashing bails at the bowler's end...

Seb Horner: Have to criticise B Mac's captaincy here...to leave seven of the last 17 overs to your part time bowlers with AB & Faf about is poor.

Bob: NZ really need a wicket soon or they'll be chasing a big, big total.

With only three men outside the circle during this powerplay, De Villiers immediately punishes the side who have just dropped them, by hoisting a six over long-on and whacking a couple of fours past mid-off to bring up his fifty from only 32 balls. A single allows him to keep the strike - just 15 in four balls since he was dropped.

Scotty Reynolds: NZ have dropped more catches than they have taken. You don't win a World Cup doing that.