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LONDON, ENGLAND - DECEMBER 03: Mako Vunipola of England looks on during the Old Mutual Wealth Series match between England and Australia at Twickenham Stadium on December 3, 2016 in London, England. (Photo by David Rogers - RFU/The RFU Collection via Getty Imagesges)

LONDON, ENGLAND - DECEMBER 03:  Mako Vunipola of England looks on during the Old Mutual Wealth Series match between England and Australia at Twickenham Stadium on December 3, 2016 in London, England.  (Photo by David Rogers - RFU/The RFU Collection via Getty Imagesges)

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DUBLIN, IRELAND - NOVEMBER 19: Tadhg Furlong of Ireland is tackled during the international rugby match between Ireland and the New Zealand All Blacks at Aviva Stadium on November 19, 2016 in Dublin, Ireland. (Photo by Phil Walter/Getty Images)

DUBLIN, IRELAND - NOVEMBER 19: Tadhg Furlong of Ireland is tackled during the international rugby match between Ireland and the New Zealand All Blacks at Aviva Stadium on November 19, 2016 in Dublin, Ireland.  (Photo by Phil Walter/Getty Images)

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Dublin , Ireland - 25 November 2016; Jack McGrath of Ireland during the captain's run at the Aviva Stadium in Dublin. (Photo By Ramsey Cardy/Sportsfile via Getty Images)

Dublin , Ireland - 25 November 2016; Jack McGrath of Ireland during the captain's run at the Aviva Stadium in Dublin. (Photo By Ramsey Cardy/Sportsfile via Getty Images)

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3 October 2015; WP Nel, Scotland. 2015 Rugby World Cup, Pool B, South Africa v Scotland, St James' Park, Newcastle, England. Picture credit: Ramsey Cardy / SPORTSFILE (Photo by Sportsfile/Corbis/Sportsfile via Getty Images)

3 October 2015; WP Nel, Scotland. 2015 Rugby World Cup, Pool B, South Africa v Scotland, St James' Park, Newcastle, England. Picture credit: Ramsey Cardy / SPORTSFILE (Photo by Sportsfile/Corbis/Sportsfile via Getty Images)

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LONDON, ENGLAND - DECEMBER 02: Dan Cole looks on during the England captain's run at Twickenham Stadium on December 2, 2016 in London, England. (Photo by David Rogers/Getty Images)

LONDON, ENGLAND - DECEMBER 02:  Dan Cole looks on during the England captain's run at Twickenham Stadium on December 2, 2016 in London, England.  (Photo by David Rogers/Getty Images)