The Munster wing, Doug Howlett, will miss the rest of the season due to a ruptured Achilles tendon.
The former All Black will undergo an operation to repair the injury and a lengthy period of rehab means that the 33-year-old will play no part in the remainder of Munster's Heineken Cup campaign.
The 2006 and 2008 champions go into the critical back-to-back round 3 and round 4 games against the Scarlets fresh from two dramatic last-gasp victories over Northampton Saints and Castres.
The first contest between the two unbeaten clubs in Pool 1 gets under way at Parc y Scarlets on Saturday. (kick-off: 3.40pm)
As the dust settles on another fantastic ERC finals weekend listen to the post weekend reaction from Jonny Wilkinson, Delon Armitage, Vern Cotter, Sergio Parisse, Jamie Heaslip, Joe Schmidt and other key players.