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NORTHAMPTON, ENGLAND - DECEMBER 06: Dylan Hartley looks on during the Northampton Saints at Franklin's Gardens on December 6, 2016 in Northampton, England. (Photo by David Rogers/Getty Images)

NORTHAMPTON, ENGLAND - DECEMBER 06:  Dylan Hartley looks on during the Northampton Saints at Franklin's Gardens on December 6, 2016 in Northampton, England.  (Photo by David Rogers/Getty Images)

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CARDIFF, WALES - NOVEMBER 19: Sam Warburton of Wales has Jonathan Davies in support as he is held up by Timothy Lafaele of Japan during the International match between Wales and Japan at the Principality Stadium on November 19, 2016 in Cardiff, Wales. (Photo by Michael Steele/Getty Images)

CARDIFF, WALES - NOVEMBER 19:  Sam Warburton of Wales has Jonathan Davies in support as he is held up by Timothy Lafaele of Japan during the International match between Wales and Japan at the Principality Stadium on November 19, 2016 in Cardiff, Wales.  (Photo by Michael Steele/Getty Images)

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Dublin , Ireland - 26 November 2016; Ireland captain Rory Best with his wife Jodie and children Richie, Ben and Penny and niece Alex Ruddock after the Autumn International match between Ireland and Australia at the Aviva Stadium in Dublin. (Photo By Brendan Moran/Sportsfile via Getty Images)

Dublin , Ireland - 26 November 2016; Ireland captain Rory Best with his wife Jodie and children Richie, Ben and Penny and niece Alex Ruddock after the Autumn International match between Ireland and Australia at the Aviva Stadium in Dublin. (Photo By Brendan Moran/Sportsfile via Getty Images)