Munster quartet Malakai Fekitoa, Conor Murray, RG Snyman and Calvin Nash are all out of Saturday's United Rugby Championship semi-final against Leinster at the Aviva Stadium due to head injuries.
They were all removed for HIAs during last Saturday night's bruising quarter-final victory over Glasgow Warriors and are following return to play protocols.
The province are also awaiting the results of a scan on Peter O'Mahony's elbow, but Tadhg Beirne did come through his return from an ankle injury unscathed as he played the full 80 minutes at Scotstoun.
Diarmuid Barron [shoulder] will also be monitired as the week progresses, while Liam O’Connor [neck], Eoin O’Connor [shoulder], Jack Daly [knee], Paddy Patterson [knee], Keith Earls [groin], Paddy Kelly [head], Andrew Conway [knee] and Liam Coombes [thigh] remain unavailable.
Follow Leinster v Munster via our live blog on RTÉ.ie/sport and the RTÉ News app, watch live on RTÉ2 and the RTÉ Player, or listen to commentary on RTÉ Radio 1's Saturday Sport.
