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CARDIFF, WALES - OCTOBER 11: Peter O'Mahony of Ireland receives medical treatment during the 2015 Rugby World Cup Pool D match between France and Ireland at Millennium Stadium on October 11, 2015 in Cardiff, United Kingdom. (Photo by Laurence Griffiths/Getty Images)

CARDIFF, WALES - OCTOBER 11:  Peter O'Mahony of Ireland receives medical treatment during the 2015 Rugby World Cup Pool D match between France and Ireland at Millennium Stadium on October 11, 2015 in Cardiff, United Kingdom.  (Photo by Laurence Griffiths/Getty Images)