Stephen Ferris is the latest confirmed absentee for Ireland's crucial clash against Argentina on November 24 after his ankle injury proved to be more serious than initially feared.
Both players sustained impact injuries during the 16-12 defeat to South Africa, when Ireland's collective performance fell well below the level of some significant individual displays.
Defence coach Anthony Foley has declared that Ireland will treat the Fijians with the utmost respect as Ireland reel from a run of five successive Test defeats, a record that will remain unchanged regardless of this weekend's efforts.
"Nobody likes losing," he said. "Sometimes you have to look at the manner of it. The manner of the 60-0 loss in New Zealand and Saturday's loss were completely different, chalk and cheese.
"There's a few issues we need to iron out. We need to make sure we build some momentum for this game.
"We are preparing like a Test match. It is no different to how we prepared last week – same meetings, same intensity and when we train we will have the same vigour.
"Obviously there will be different requirements from different players. The important thing is this is another Test match week for us and we make sure everybody is equipped properly for Fiji.
"They will punish you if you give them an opportunity. Our job is to make sure they get no opportunity."