Munster have confirmed that backs Johnny Holland and Gerhard van den Heever are set for lengthy spells on the sidelines, while their Ireland international prop Dave Kilcoyne has been ruled out for a number of weeks.
A late 10-point burst, including an injury-time penalty from Ian Keatley, could yet prove crucial for Munster who battled all the way in today's 26-19 defeat to European Champions Cup Pool 1 leaders Clermont Auvergne.
European Champions Cup Pool 3 is especially tight at the moment with only five points separating the bottom-placed Scarlets from table toppers Toulon. If third-placed Ulster can chalk up another win in Llanelli, they will remain in the running for a quarter-final spot.
Clermont Auvergne managed to swap places with Munster at the top of European Champions Cup Pool 1 last weekend, so can the Reds bite back on Sunday and end the French side's own formidable record at the Stade Marcel Michelin?
Lying just a point behind Pool 2 leaders Exeter Chiefs, Connacht are hoping to complete a quick-fire double over French side Bayonne and edge closer to reaching the European Challenge Cup knockout stages.
Munster head coach Anthony Foley has named his team to take on Clermont Auvergne in round 4 of the European Champions Cup at the Stade Marcel Michelin on Sunday (kick-off 4.15pm local time/3.15pm Irish time).
After a bruising encounter with Clermont Auvergne at Thomond Park last Saturday, the Munster squad gathered in their respective centres today as preparations continued for the return leg of the back-to-back Champions Cup fixtures.
Ulster and Connacht both recorded bonus point wins in their European games on Saturday, while Munster and Leinster lost out to Clermont Auvergne and Harlequins respectively. Check out our match photo galleries.