"Sam Warburton will undergo surgery following a recurrence of a long-standing neck injury," the club said. "The Cardiff Blues flanker... exacerbated the injury in training this week."
Wales play Australia in Cardiff on Nov. 11 in the first of four autumn internationals, before matches against Georgia, New Zealand and South Africa.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
(Reporting by Simon Jennings in Bengaluru; Editing by Christian Radnedge)
