Ireland will wait until Friday to decide on the fitness of second row Paul O'Connell and centre Gordon D'Arcy for Sunday's match with Russia in Rotorua.
The duo underwent scans on Monday which confirmed they had both suffered hamstring strains during the 15-6 Pool C win over Australia on Saturday night.
An Ireland press release said both players would be monitored over the coming days but no decision would be made until the team to face the Bears was announced at 13:15 on Friday.
The Ireland squad enjoyed a rest day after relocating their team base from Auckland to Lake Taupo as they prepared to face Russia.
Second row Donncha O'Callaghan said: "With a bit of a longer turnaround this week than we had for the Australia game, it's great to be able to have that extra day to let the bumps and bruises settle before we hit the training pitch again.
"There was an incredible buzz around the lads when we were setting off from Auckland to come down here. You expect that after a good win, but something we've all been chatting about is that we need to remain focused on the job at hand.
"Our goal has always been to qualify from our pool and just because we had a big win on Saturday night, it guarantees us nothing.
"We have two games left against two teams (Russia and Italy) who will challenge us physically across the park, so we want to get ourselves right for that."
O'Callaghan also praised the support Ireland have received at RWC 2011.
"The amount of green in the stadium on Saturday was incredible, as it was in New Plymouth (against USA). Hopefully we can get similar support in Rotorua this week."