Doubts continue over Jack Conan’s World Cup future after the Leinster back row was pictured in a protective moon boot prior to Ireland's clash with Japan at Shizuoka Stadium.
The Leinster man was set to start Saturday's tie but suffered an injury in training midweek after a team-mate accidentally stood on his foot.
Speaking at his midweek press conference, Irish scrum coach Greg Feek described the issue as a 'setback'.
We're going to get some opinions on that over the next couple of days and then go from there. It's a little bit of a setback at this stage but I think once we get the game out of the way and we get the reports in from medical and the strength and conditioning team, we will probably have some more information on that. Probably after the game, I'd say.
Jordi Murphy would replace Conan if he the injury forced him out of the tournament. The Ulster man was pulled from the matchday squad prior to their Pro14 clash with Ospreys on Friday night. Ulster won the game 38-14.
Conan impressed off the bench during the opening game against Scotland. He was not wearing the boot when he appeared pitchside for the captain's run on Friday but emerged with it on Saturday. An update on his fitness is expected after the game.