12 Dec, 14:42
Prop Cian Healy is expected to miss the start of the 2014 RBS 6 Nations after undergoing surgery on his injured ankle on Wednesday.
O'Connell, Williams, Horgan and Foley all took part but to varying degrees with O'Connell the main doubt as he attemots to recover from damaged ankle ligaments.
According to team manager Jerry Holland, the quartet all "continue to make progress. The problem is of course that time is getting short now, but we will give them all the time we can to prove their readiness."
The starting line-up cannot be named before Friday (2pm) when Munster and Leicester name their sides at a joint press conference at the Millennium Stadium.