Rugby Union - European Rugby Champions Cup - Leicester Tigers v Scarlets - Welford Road Stadium, Leicester, Britain - October 19, 2018 Scarlets' Tom Price in action with Leicester Tigers' Tatafu Polota Nau Action Images via Reuters/Andrew Boyers 

Rugby Union - European Rugby Champions Cup - Leicester Tigers v Scarlets - Welford Road Stadium, Leicester, Britain - October 19, 2018 Scarlets' Tom Price in action with Leicester Tigers' Tatafu Polota Nau (L) and Greg Bateman Action Images via Reuters/Andrew Boyers 

Rugby Union - European Rugby Champions Cup - Leicester Tigers v Scarlets - Welford Road Stadium, Leicester, Britain - October 19, 2018 Leicester Tigers' Dan Cole (L) and Tatafu Polota Nau in action with Scarlets' Hadleigh Parkes Action Images via Reuters/Andrew Boyers 

Rugby Union - Premiership - Leicester Tigers vs Newcastle Falcons - Welford Road Stadium, Leicester, Britain - April 27, 2018 Leicester Tigers' Tatafu Polota-Nau in action with Newcastle Falcons' Ally Hogg Action Images/Andrew Boyers 

Rugby Union - Premiership - Leicester Tigers vs Newcastle Falcons - Welford Road Stadium, Leicester, Britain - April 27, 2018 Leicester Tigers' Tatafu Polota-Nau in action with Newcastle Falcons' Gary Graham (L) and Newcastle Falcons' Sam Lockwood Action Images/Andrew Boyers 

Rugby Union - Rugby Test - Japan Brave Blossoms v Australia Wallabies - Nissan stadium, Yokohama, Japan - November 4, 2017 - Australia's Tatafu Polota-Nau scores a try. REUTERS/Toru Hanai 

Rugby Union - Championship - Australia's Wallabies captain's run - Malvinas Argentinas stadium, Mendoza, Argentina - October 6, 2017 - Australia's Stephen Moore stands next to teammate Tatafu Polota-Nau during the captain's run ahead of their match against Argentina. REUTERS/Marcos Brindicci 

Rugby Union - Australia vs Scotland - Sydney Football Stadium, Sydney, Australia - June 17, 2017 - Australia's Tatafu Polota-Nau is tackled by Scotland's Jonny Gray. REUTERS/David Gray 

Rugby Union - Argentina v Australia - IRB Rugby World Cup 2015 Semi Final - Twickenham Stadium, London, England - 25/10/15
Australia's Bernard Foley celebrates at the end of the game with Tatafu Polota Nau
Reuters / Dylan Martinez
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Rugby Union - Argentina v Australia - IRB Rugby World Cup 2015 Semi Final - Twickenham Stadium, London, England - 25/10/15
Australia's Bernard Foley celebrates at the end of the game with Tatafu Polota Nau
Reuters / Dylan Martinez
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Rugby Union - Argentina v Australia - IRB Rugby World Cup 2015 Semi Final - Twickenham Stadium, London, England - 25/10/15
Australia's Tatafu Polota Nau in action
Action Images via Reuters / Henry Browne
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Rugby Union - Argentina v Australia - IRB Rugby World Cup 2015 Semi Final - Twickenham Stadium, London, England - 25/10/15
Australia's Tatafu Polota Nau in action
Action Images via Reuters / Henry Browne
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Rugby Union - Argentina v Australia - IRB Rugby World Cup 2015 Semi Final - Twickenham Stadium, London, England - 25/10/15
Australia's Tatafu Polota-Nau in action
Reuters / Stefan Wermuth
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Rugby Union - Australia Captain's Run - The Lensbury Hotel, Teddington, Middlesex - 24/10/15
Australia's Tatafu Polota Nau and Bernard Foley during training
Action Images via Reuters / Peter Cziborra
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Rugby Union - Australia v Wales - IRB Rugby World Cup 2015 Pool A - Twickenham Stadium, London, England - 10/10/15
Australia's Stephen Moore and Tatafu Polota Nau celebrate after the game
Action Images via Reuters / Andrew Couldridge
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Rugby Union - Australia v Wales - IRB Rugby World Cup 2015 Pool A - Twickenham Stadium, London, England - 10/10/15
Australia's Stephen Moore and Tatafu Polota Nau celebrate after the game
Action Images via Reuters / Andrew Couldridge
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New Zealand's All Blacks captain Richie McCaw (L) shakes hands with Australia's Wallabies Tatafu Polota-Nau as team mate Kurtley Beale (R) celebrates their win over the All Blacks in their Bledisloe Cup rugby match in Sydney, August 8, 2015. REUTERS/David Gray 

The back of Australia's Tatafu Polota-Nau is seen during their international Rugby Union match against England at Twickenham stadium in London November 17, 2012. REUTERS/Russell Cheyne (BRITAIN - Tags: SPORT RUGBY) 

Argentina's Lucas Gonzalez Amorosino (C) is tackled by Australia's Radike Samo (L) and and Tatafu Polota Nau during their Rugby Championship match at Skilled Park in Gold Coast, Australia September 15, 2012. REUTERS/Jason O'Brien (AUSTRALIA - Tags: SPORT RUGBY TPX IMAGES OF THE DAY) 

Australia's Tatafu Polota Nau (C) is tackled by Gethin Jenkins (L) and Adam Jones of Wales during their international rugby test match in Melbourne June 16, 2012. REUTERS/Mal Fairclough (AUSTRALIA - Tags: SPORT RUGBY) 

Australia Wallabies' Quade Cooper (R) passes the ball over teammate Tatafu Polota-Nau during their Rugby World Cup third place play-off match against Wales at Eden Park in Auckland October 21, 2011. REUTERS/Nigel Marple (NEW ZEALAND - Tags: SPORT RUGBY)

Australia Wallabies captain James Horwill (L) walks in the surf with teammates Ben Alexander (C) and Tatafu Polota-Nau during a team recovery session at Takapuna Beach in Auckland October 17, 2011, a day after they lost their Rugby World Cup semi-final match against New Zealand All Blacks. REUTERS/David Gray (NEW ZEALAND - Tags: SPORT RUGBY)

(From L to R) Australia Wallabies' Tatafu Polota-Nau, Pat McCabe, Rob Simmons, Ben Alexander, Adam Ashley-Cooper and Quade Cooper (bent over) react after losing their Rugby World Cup semi-final match against New Zealand All Blacks at Eden Park in Auckland October 16, 2011. REUTERS/David Gray (NEW ZEALAND - Tags: SPORT RUGBY)

Australia Wallabies' Tatafu Polota-Nau (L) and Rob Simmons react after losing their Rugby World Cup semi-final match against New Zealand All Blacks at Eden Park in Auckland October 16, 2011. REUTERS/David Gray (NEW ZEALAND - Tags: SPORT RUGBY)

Australia Wallabies Tatafu Polota-Nau (L), Digby Ioane (2nd L) and Luke Burgess (R) listen to a question with assistant team coach David Nucifora during a media conference in Auckland October 13, 2011. The Wallabies will play against New Zealand All Blacks in their Rugby World Cup semi-final match on Sunday. REUTERS/David Gray (NEW ZEALAND - Tags: SPORT RUGBY)

Australia Wallabies Tatafu Polota-Nau (L) reacts to a question as teammate Digby Ioane laughs during a media conference in Auckland October 13, 2011. The Wallabies will play against New Zealand All Blacks in their Rugby World Cup semi-final match on Sunday. REUTERS/David Gray (NEW ZEALAND - Tags: SPORT RUGBY)

Australia Wallabies Digby Ioane (L) dances as teammate Tatafu Polota-Nau looks on during a media conference in Auckland October 13, 2011. The Wallabies will play against New Zealand All Blacks in their Rugby World Cup semi-final match on Sunday. REUTERS/David Gray (NEW ZEALAND - Tags: SPORT RUGBY)

Australia Wallabies' Tatafu Polota-Nau (R) tackles Nese Malifa of the U.S. during their Rugby World Cup Pool C match at Wellington Regional Stadium in Wellington September 23, 2011. REUTERS/David Gray (NEW ZEALAND - Tags: SPORT RUGBY)

Australia Wallabies' Tatafu Polota-Nau takes part in a training session in Auckland September 13, 2011. Australia will play against Ireland in their Rugby World Cup Pool C match at Eden Park on Saturday. REUTERS/Bogdan Cristel (NEW ZEALAND - Tags: SPORT RUGBY)

New Zealand's Highlanders Jason Rutledge (2) looks down as (L to R) Tatafu Polota-Nau, Tom Carter and Daniel Halangahu of Australia's New South Wales Waratahs celebrate a try during their Super Rugby union match in Sydney June 11, 2011. REUTERS/Tim Wimborne (AUSTRALIA - Tags: SPORT RUGBY) 

New Zealand's Highlanders Jason Rutledge (2) looks down as (L to R) Tatafu Polota-Nau, Tom Carter and Daniel Halangahu of Australia's New South Wales Waratahs celebrate a try during their Super Rugby union match in Sydney June 11, 2011. REUTERS/Tim Wimborne (AUSTRALIA - Tags: SPORT RUGBY) 

Pierre Spies (L) of South Africa's Bulls challenges Tatafu Polota-Nau of Australia's Waratahs during their Super 15 rugby match in Pretoria June 3, 2011.
REUTERS/Siphiwe Sibeko (SOUTH AFRICA - Tags: SPORT RUGBY) 

Patrick Lambie of South Africa's Sharks is tackled by Tatafu Polota-Nau (R) and an unidentified player of Australia's Waratahs during their Super 15 rugby match in Durban, May 28, 2011. REUTERS/Rogan Ward (SOUTH AFRICA - Tags: SPORT RUGBY) 

Aaron Cruden (2nd L) of New Zealand's Hurricanes is tackled by Tatafu Polota-Nau (L) and Jeremy Tilse of Australia's NSW Waratahs during their Super 14 rugby match in Sydney May 14, 2010. REUTERS/Daniel Munoz (AUSTRALIA - Tags: SPORT RUGBY) 

Michael Paterson (C) of New Zealand's Hurricanes fights the ball with Kane Douglas (R) and Tatafu Polota-Nau of Australia's NSW Waratahs during their Super 14 rugby match in Sydney May 14, 2010. REUTERS/Daniel Munoz (AUSTRALIA - Tags: SPORT RUGBY) 

Tatafu Polota-Nau (R) of Australia's NSW Waratahs fights for the ball with Conrad Smith of New Zealand's Hurricanes during their Super 14 rugby match in Sydney May 14, 2010. REUTERS/Daniel Munoz (AUSTRALIA - Tags: SPORT RUGBY) 

Tatafu Polota-Nau of Australia's Waratahs gets a pass away in the tackle against New Zealand's Waikato's Chiefs during their Super 14 rugby match at Waikato Stadium in Hamilton May 8, 2010. The Waratahs won the match. REUTERS/Nigel Marple (NEW ZEALAND - Tags: SPORT RUGBY) 

Ben Mowen (R) and Tatafu Polota-Nau of Australia's NSW Waratahs try to catch a high ball during their Super 14 match against Australia's ACT Brumbies in Sydney April 24, 2010. REUTERS/Daniel Munoz (AUSTRALIA - Tags: SPORT RUGBY) 

Adrian Jacobs (L) of South Africa's Sharks is tackled by Tatafu Polota-Nau of Australia's NSW Waratahs during their Super 14 rugby match in Sydney March 6, 2010. REUTERS/Daniel Munoz (AUSTRALIA - Tags: SPORT RUGBY) 

New Zealand's All Blacks Conrad Smith (L) and captain Richie McCaw (2nd L) pose with Australia's Wallabies captain Rocky Elsom and teammate Tatafu Polota-Nau after their joint news conference for their 2009 Bledisloe Cup rugby match in Tokyo October 27, 2009. The match will be held on October 31 in Tokyo. REUTERS/Issei Kato (JAPAN SPORT RUGBY) 

Australian Wallabies' Tatafu Polota-Nau (L) tries to block a kick from New Zealand Dan Carter during their Tri-Nations rugby union test match in Wellington September 19, 2009. REUTERS/Anthony Phelps (NEW ZEALAND SPORT RUGBY) 

Australia's Tatafu Polota-Nau practices lineout throwins during the captains run in preparation for their international rugby test match against New Zealand's All Blacks in Wellington, September 18, 2009. REUTERS/Anthony Phelps (NEW ZEALAND SPORT RUGBY) 

Australia's Dean Mumm (C) catches the ball as he is lifted by Tatafu Polota-Nau (L) and Benn Robinson during the Wallabies Captain's Run in Sydney August 21, 2009. Australia will face New Zealand for a Bledisloe Cup test match on Saturday in Sydney. REUTERS/Daniel Munoz (AUSTRALIA SPORT RUGBY) 

Italy's Jean-Francois Montauriol (rear) fails to stop Australia's Tatafu Polota-Nau (front) from scoring during their rugby union international in Melbourne June 20, 2009. REUTERS/Mick Tsikas (AUSTRALIA SPORT RUGBY) 

Tatafu Polota-Nau (C) of Australia's New South Wales Waratahs is tackled by Ricky Januarie (R) and Schalk Brits of South Africa's Stormers during their Super 14 rugby match in Sydney April 4, 2009. REUTERS/Daniel Munoz (AUSTRALIA SPORT RUGBY) 

Lachie Turner (R) of Australia's New South Wales Waratahs is embraced by his teammate Tatafu Polota-Nau after scoring his second try against South Africa's Stormers during their Super 14 rugby match in Sydney April 4, 2009. REUTERS/Daniel Munoz (AUSTRALIA SPORT RUGBY) 

Tatafu Polota-Nau (with ball) of Australia's New South Wales Waratahs tries to evade the tackle of Joe Rokocoko, Taniela Moa and Jimmy Gopperth (L to R) of New Zealand's Auckland Blues during their Super 14 rugby match in Auckland March 27, 2009. The Waratahs won the match 27-22. REUTERS/Nigel Marple (NEW ZEALAND SPORT RUGBY) 

Tatafu Polota-Nau (R) and Phil Waugh (front L) of Australia's New South Wales Waratahs try to break through New Zealand's Auckland Blues during their Super 14 rugby match in Auckland March 27, 2009. The Waratahs won the match 27-22. REUTERS/Nigel Marple (NEW ZEALAND SPORT RUGBY) 

Tatafu Polota-Nau of Australia's New South Wales Waratahs is tackled by Adam Whitelock (14) of New Zealand's Canterbury Crusaders during their Super 14 rugby match in Sydney March 21, 2009. REUTERS/Daniel Munoz (AUSTRALIA SPORT RUGBY) 

Tatafu Polota-Nau of Australia's New South Wales Waratahs is tackled by Adam Whitelock (14) of New Zealand's Canterbury Crusaders during their Super 14 rugby match in Sydney March 21, 2009. REUTERS/Daniel Munoz (AUSTRALIA SPORT RUGBY) 

Waratahs' Brett Sheehan (L) celebrates with his teammate Tatafu Polota-Nau after scoring a try during their Super 14 rugby union match against Highlanders in Sydney February 27, 2009. REUTERS/Daniel Munoz (AUSTRALIA) 

South Africa's Ruan Pienaar breaks past Australia's Tatafu Polota-Nau (L) and Wycliff Palu (2nd L) in their Tri-Nations rugby union clash in Johannesburg, August 30, 2008. REUTERS/Mike Hutchings (SOUTH AFRICA) 

New Zealand's Jimmy Cowan (R) passes the ball as team mate Jerome Kaino (2nd L) and Australia's Tatafu Polota-Nau (3rd-L) look on during their first Bledisloe Cup and Tri-Nations rugby test match in Sydney July 26, 2008. REUTERS/Will Burgess (AUSTRALIA) 

Crusaders Richie McCaw charges away from Waratahs Tatafu Polota-Nau (R) with Crusaders Ti'i Paulo (L) in support during the Super 14 rugby final in Christchurch May 31, 2008. REUTERS/Simon Baker (NEW ZEALAND) 

Tatafu Polota-Nau of the Waratahs of Australia scores a try against the Lions of South Africa during their Super 14 rugby match in Sydney April 19, 2008. REUTERS/Will Burgess (AUSTRALIA) 

Tatafu Polota-Nau (C) of the Waratahs of Australia celebrates his try against the Lions of South Africa as team mates pile on top of him during their Super 14 rugby match in Sydney April 19, 2008. REUTERS/Will Burgess (AUSTRALIA) 

Richie McCaw, captain of the Crusaders of New Zealand (2nd-L), attacks the defence of Josh Valentine (L) and Tatafu Polota-Nau of the Waratahs from Australia (R) during their Super14 rugby union match in Sydney March 31, 2007. REUTERS/Will Burgess (AUSTRALIA) 

Australia's Tatafu Polota-Nau (16) tackles Scotland's Sean Lamont during their rugby union test match at Murrayfield Stadium in Edinburgh, Scotland November 25 2006. REUTERS/David Moir(BRITAIN) 

Jerry Collins (2nd R) and team mate Piri Weepu (bottom) of the Hurricanes from New Zealand tackle Tatafu Polota-Nau (C) of the the New South Wales Waratahs during their Super 14 rugby match in Sydney May 13, 2006. The Hurricanes won 19-14. REUTERS/Will Burgess 

England's Mark Cueto (2nd L) scores a try as Australia's Tatafu Polota-Nau (L) and Lloyd Johansson (R) are unable to stop him during their rugby union international at Twickenham in London November 12, 2005. England won 26-16. REUTERS/Toby Melville