Prince Harry of Britain (2nd L) applauds as Richie McCaw of New Zealand (C) holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Eddie Keogh TPX IMAGES OF THE DAY 

Richie McCaw of New Zealand (C) holds the Webb Ellis Cup as he celebrates with teammates Dan Carter (L) and Ma'a Nonu (R) after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Paul Childs TPX IMAGES OF THE DAY 

Richie McCaw of New Zealand (C) holds the Webb Ellis Cup as he celebrates with teammates Dan Carter (L) and Ma'a Nonu (R) after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Paul Childs 

Captain Richie McCaw of New Zealand and Kieran Read hold up the Webb Ellis Cup after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. New Zealand won by 34-17. REUTERS/Henry Browne

Richie McCaw of New Zealand holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

Prince Harry of Britain (2nd L) applauds as Richie McCaw of New Zealand (C) holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth

Richie McCaw of New Zealand holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

Richie McCaw of New Zealand holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Paul Childs

Richie McCaw of New Zealand (L) shakes hands with Britain's Prince Harry as Chairman of World Rugby Bernard Lapasset (R) looks on during the ceremony after they beat Australia to win their Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez 

Prince Harry of Britain (L) applauds as Richie McCaw of New Zealand (C) holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Eddie Keogh

Captain Richie McCaw of New Zealand holds up the Webb Ellis Cup after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. New Zealand won by 34-17. REUTERS/Henry Browne 

Richie McCaw of New Zealand (L) holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez

Captain Richie McCaw of New Zealand holds up the Webb Ellis Cup after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. New Zealand won by 34-17. REUTERS/Toby Melville TPX IMAGES OF THE DAY

Captain Richie McCaw of New Zealand holds up the Webb Ellis Cup after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. New Zealand won by 34-17. REUTERS/Henry Browne

Richie McCaw of New Zealand (L) holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez 

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez TPX IMAGES OF THE DAY 

Britain's Prince Harry applauds as captain Richie McCaw of New Zealand holds up the Webb Ellis Cup after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. New Zealand won by 34-17. REUTERS/Henry Browne

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez TPX IMAGES OF THE DAY 

Richie McCaw of New Zealand (C) holds up the Webb Ellis trophy as the team celebrates after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth

Captain Richie McCaw of New Zealand holds up the Webb Ellis Cup after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. New Zealand won by 34-17. REUTERS/Henry Browne

Captain Richie McCaw of New Zealand holds up the Webb Ellis Cup after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. New Zealand won by 34-17. REUTERS/Henry Browne

Richie McCaw of New Zealand holds up the Webb Ellis Cup after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. New Zealand won by 34-17. REUTERS/Henry Browne

Richie McCaw of New Zealand (C) receives the Webb Ellis trophy from Prince Harry of Britain after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Paul Childs

Richie McCaw of New Zealand (R) receives the Webb Ellis trophy from Prince Harry of Britain after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

Richie McCaw of New Zealand shakes hands with Britain's Prince Harry (R) as he holds the Webb Ellis Cup to celebrate with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Paul Childs

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Paul Childs TPX IMAGES OF THE DAY 

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez TPX IMAGES OF THE DAY 

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez 

Richie McCaw of New Zealand (L) holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez 

Richie McCaw of New Zealand (C) holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. At L, Britain's Prince Harry looks on. REUTERS/Dylan Martinez TPX IMAGES OF THE DAY 

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. At L, Britain's Prince Harry. REUTERS/Dylan Martinez 

Richie McCaw of New Zealand holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

Richie McCaw of New Zealand holds the Webb Ellis Cup as he celebrates with teammates after beating Australia to win the Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. At L, Britain's Prince Harry. REUTERS/Dylan Martinez

Richie McCaw of New Zealand (C) holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

Richie McCaw of New Zealand (C) holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Eddie Keogh

Richie McCaw of New Zealand (C) holds up the Webb Ellis trophy after winning the Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Eddie Keogh TPX IMAGES OF THE DAY 

Richie McCaw (L) and Aaron Smith (R) of New Zealand celebrate after winning their Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

Richie McCaw of New Zealand celebrates after winning their Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

Richie McCaw of New Zealand (C) celebrates with team mates after winning their Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Eddie Keogh

Richie McCaw of New Zealand (2ndL) passes to Joe Moody of New Zealand (R) during their Rugby World Cup final match against Australia at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez

Richie McCaw of New Zealand (R) runs for the ball during their Rugby World Cup final match against Australia at Twickenham in London, Britain, October 31, 2015. REUTERS/Paul Childs 

Richie McCaw of New Zealand (L) is tackled by Stephen Moore of Australia during their Rugby World Cup Final at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

New Zealand captain Richie McCaw (R) reacts after a late tackle on Dan Carter of New Zealand (C) during their Rugby World Cup final match against Australia at Twickenham in London, Britain October 31, 2015. REUTERS/Henry Browne

Ma'a Nonu, Daniel Carter and Richie McCaw of New Zealand (L-R) react during their Rugby World Cup Final against Australia at Twickenham in London, October 31, 2015. REUTERS/Stefan Wermuth 

New Zealand captain Richie McCaw (L) reacts after a late tackle on Dan Carter of New Zealand (C) during their Rugby World Cup final match against Australia at Twickenham in London, Britain October 31, 2015. REUTERS/Toby Melville

Drew Mitchell of Australia (C) is tackled by Richie McCaw of New Zealand during their Rugby World Cup final match at Twickenham in London, Britain October 31, 2015. REUTERS/Toby Melville

Stephen Moore of Australia (C) is tackled by Richie McCaw of New Zealand (2ndR) during their Rugby World Cup final match at Twickenham in London, Britain, October 31, 2015. REUTERS/Dylan Martinez TPX IMAGES OF THE DAY 

Richie McCaw of New Zealand (R) and teammates performs the haka before their Rugby World Cup final match against Australia at Twickenham in London, Britain, October 31, 2015. REUTERS/Paul Childs

Richie McCaw of New Zealand (2ndR) and teammates performs the haka before their Rugby World Cup final match against Australia at Twickenham in London, Britain, October 31, 2015. REUTERS/Paul Childs 

Richie McCaw of New Zealand arrives for the Rugby World Cup final between New Zealand and Australia at Twickenham in London, Britain October 31, 2015. REUTERS/Henry Browne

Rugby Union - New Zealand Training - Pennyhill Park, Bagshot, Surrey - 29/10/15
New Zealand's Richie McCaw (L) and TJ Perenara during training
Action Images via Reuters / Paul Childs
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Rugby Union - New Zealand Training - Pennyhill Park, Bagshot, Surrey - 29/10/15
New Zealand's Richie McCaw during training
Action Images via Reuters / Paul Childs
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Rugby Union - New Zealand Training - Pennyhill Park, Bagshot, Surrey - 29/10/15
New Zealand's Richie McCaw (2nd L) during training
Action Images via Reuters / Paul Childs
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Rugby Union - New Zealand Training - Pennyhill Park, Bagshot, Surrey - 29/10/15
New Zealand's Richie McCaw during training
Action Images via Reuters / Paul Childs
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Rugby Union - New Zealand Training - Pennyhill Park, Bagshot, Surrey - 29/10/15
New Zealand's Richie McCaw during training
Action Images via Reuters / Paul Childs
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