Pics: NZ V Boks

The New Zealand team sing the national anthem before their Rugby World Cup Semi-Final match against South Africa at Twickenham. REUTERS/Stefan Wermuth

A supporter of New Zealand cheers before the Rugby World Cup Semi-Final match against South Africa at Twickenham. REUTERS/Russell Cheyne

Supporters of South Africa smile before the Rugby World Cup Semi-Final match against New Zealand at Twickenham. REUTERS/Russell Cheyne

Richie McCaw of New Zealand leads his team during the haka as the South Africa team watch during their Rugby World Cup semi-final match at Twickenham. REUTERS/Paul Childs

New Zealand players perform the haka before their Rugby World Cup Semi-Final match against South Africa at Twickenham. REUTERS/Stefan Wermuth

Jesse Kriel of South Africa (C) is tackled by Ben Smith of New Zealand during their Rugby World Cup semi-final at Twickenham. REUTERS/Toby Melville

Eben Etzebeth of South Africa blocks a kick by Aaron Smith of New Zealand during their Rugby World Cup semi-final at Twickenham. REUTERS/Toby Melville

Duane Vermeulen of South Africa and Julian Savea of New Zealand jump for the ball during their Rugby World Cup Semi-Final match at Twickenham. REUTERS/Stefan Wermuth

Joe Moody of New Zealand is tackled by members of the South Africa team during during their Rugby World Cup semi-final at Twickenham. REUTERS/Paul Childs

Jerome Kaino of New Zealand runs to score a try during their Rugby World Cup Semi-Final match against South Africa at Twickenham. REUTERS/Stefan Wermuth

Nehe Milner-Skudder of New Zealand (R) is tackled by Lodewyk De Jager of South Africa (2ndR) during their Rugby World Cup Semi-Final match at Twickenham. REUTERS/Stefan Wermuth

Jerome Kaino of New Zealand (L) and Schalk Burger of South Africa jump for the ball in a lineout during their Rugby World Cup semi-final match at Twickenham in London. REUTERS/Toby Melville

Francois Louw of South Africa tackles Brodie Retallick of New Zealand (top) during their Rugby World Cup semi-final against South Africa at Twickenham. REUTERS/Henry Brown

Brodie Retallick of New Zealand tries to block a kick by Fourie Du Preez of South Africa during their Rugby World Cup semi-final at Twickenham. REUTERS/Toby Melville

Dan Carter of New Zealand kicks and scores a drop goal during their Rugby World Cup semi-final match against South Africa at Twickenham. REUTERS/Paul Childs

Schalk Burger of South Africa (R) is tacked by Richie McCaw of New Zealand (C) during their Rugby World Cup Semi-Final match at Twickenham. REUTERS/Stefan Wermuth