Anderson swipes Morkel wide of long-off, De Villiers gives chase and dives head first but can only succeed in pushing the ball onto the rope. A single means it's 12 from the over and Anderson (45 from 45 balls) is back on strike for the next over.

Big over needed, KP? Righty-ho - Elliott launches the first ball of Morkel's over for six over square leg. 73 from 53.

Kevin Pietersen
Ex-England batsman on BBC Test Match Special

"We are in for a nail-biter here. New Zealand need a big over. With two set batters you can get seven, eight, nine, 10 an over."

Steyn to continue for his seventh over - he's allowed a maximum of nine today. Both sides are showing signs of nerves, whether running between the wickets hesitantly or nearly giving away overthrows, with every single potentially crucial. Elliott drives, it's in the air - but just wide of Du Plessis at short extra cover and they come back safely for two. Another single down the ground means both batsmen have 40 - Elliott from 49 balls, Anderson from 41. New Zealand need 79 from 54 balls. You'd have to be brave to call it definitively from here.

Andrew Samson
BBC Test Match Special statistician

Corey Anderson is the first New Zealander to score 200 runs and take 10 wickets in a World Cup.

The others to have done this are India's Kapil Dev (1983) and Yuvraj Singh (2011), South Africa's Lance Klusener (1999), Zimbabwe's Neil Johnson (1999), Canada's John Davison (2003) and Sri Lanka's Sanath Jayasuriya (2003).

Image source, AP

A first-ball boundary takes some of the pressure off the batting side, and attaches it to the bowling unit. Anderson sees off the over before nicking the strike with a single.

One of these two sides will reach their first ever World Cup final today. But who will it be?

Neil Manthorp
BBC Test Match Special

"We haven't had many, but this game could be an absolute stunner."

The batting powerplay is signalled - it's only four overs this one, because of the reduction in overs. Morne Morkel to bowl - and Anderson crashes the first ball through mid-off for four.

Dominic Walker: This game is being set up perfectly for Vettori to hit the winning runs.

Mark Kelly: New Zealand very composed. They know they have the Powerplay and last few overs to smash the ball around.

Rakesh Pradhan: Eight an over in the modern ODI game is nothing. take note England.

Kevin Pietersen
Ex-England batsman on BBC Test Match Special

"The powerplay is make-or-break for this game. Morne Morkel has to come to the party here."

Listen to Test Match Special commentary via the audio icon.

Steyn is bowling some serious heat here, but Elliott finds the gap with a back-cut which sails down towards third man, the lumbering Morne Morkel can't quite get to it and parries the ball onto the ropes for four.

Kevin Pietersen
Ex-England batsman on BBC Test Match Special

"It was extremely tight. He has tried to knock the ball on to his stumps and hit it with his hand. It was amazing to see AB de Villiers, one of the world's best fielders, do that."

De Villiers tries to take the ball at the non-striker's end, with Elliott nowhere. But he drops the ball and knocks the bails off with his hand. Knowing that, as per the laws of cricket, he then has to pull up a stump, he overbalances and Anderson gets back.

Image source, AP

Hesitation between the wickets, Anderson is stranded down the pitch but have South Africa messed this up?

Prayags: Going by Australia's and India's current form I believe that the winner of this semi-final will be the losing finalist.

Kevin Pietersen
Ex-England batsman on BBC Test Match Special

"A couple of wickets changes this game and Dale Steyn is the match-maker."

Listen to Test Match Special commentary via the audio icon.

Captain AB de Villiers to bowl - can his gentle medium pace be a partnership-breaker, or just smuggle through an over or two to help Duminy complete his allocation? Elliott clips a single off his legs to take his side's score to 200. With no pace on the ball, New Zealand have to do the hard yards to work it around - four from the over pushes the required rate up to the verge of eight.

And would you believe, on Duckworth-Lewis... the scores right now are nearly exactly level. While we don't anticipate more rain, it's a good guide as to who's on top.

Kuni Poonasamy: I don't understand South Africa bowling so short. I know the boundary is short straight but let the batsman take you on.

Graeme Swann
Ex-England spinner on BBC Test Match Special

"If they keep going at a run a ball for the next three overs, they will need 80 runs off their last 10 overs. South Africa need a wicket soon. New Zealand are in a good position to launch."

New Zealand 199-4 (30 overs) - target 298 from 43 overs (D/L adjusted)

Batsmen: Elliott 32 from 37 balls, Anderson 30 from 27 balls (two sixes)

Fall of wickets: 71-1 (McCullum 59), 81-2 (Williamson 6), 128-3 (Guptill 34), 149-4 (Taylor 30)

Bowling figures: Steyn 5-0-49-0, Philander 8-0-46-0, Morkel 5-0-30-2, Tahir 7-1-21-0, Duminy 5-0-43-1

South Africa 281-5 (43 overs); Du Plessis 82, De Villiers 65*, Anderson 3-72.

South Africa won toss

Scorecard