Ireland must wait to see if Tadhg Furlong and Iain Henderson will be fit to face Wales in the Six Nations on Saturday.
Tighthead prop Furlong and second row Henderson are struggling with hamstring problems and will be assessed as late as possible ahead of the match at the Aviva Stadium.
Lock James Ryan has offered coach Joe Schmidt a welcome boost, however, after he was passed fit following a groin issue.
"Tadhg is hitting his markers and he's training well," said Ireland defence coach Andy Farrell.
"He's not been in full training, he's been doing a bit-part of stuff and we'll make a decision on that Wednesday night, Thursday.
"James Ryan has been training with us fully for the last few days, so he's fully fit.
"Ian Henderson, a bit like Tadhg, is hitting his markers and pushing in the right direction. We'll assess how he pulls up after two hard days of training.
"There's not a risk, we wouldn't take risks. We back the squad that we've got, the full squad we've got, we've got quality players across the board."