A costly Peter O'Mahony red card - the first ever shown to an Irishman in Six Nations history - saw Wales eventually pull away to a 21-16 victory at a frosty Principality Stadium.
A costly Peter O'Mahony red card - the first ever shown to an Irishman in Six Nations history - saw Wales eventually pull away to a 21-16 victory at a frosty Principality Stadium.