Peter O’Mahony: Our European challenge hinges on Sunday

If anyone in Munster underestimates the importance of a successful December in fulfilling European ambitions then the dark days of 2014 and 2015 should provide the necessary jolt.

Peter O’Mahony’s side welcome Castres to Thomond Park on Sunday for the first of the back-to-back rounds against the French champions and experience has taught the captain that rounds three and four are the fixtures which can define a pool campaign.