Ireland are likely to miss the services of Robbie Henshaw for the World Cup tournament opener against Scotland next weekend following a hamstring injury.
Henshaw, who has played 38 Tests for Ireland in the last six years sustained the injury during training and will undergo a scan on Sunday to assess the extent of the damage.
With Bundee Aki, Garry Ringrose and Chris Farrell already available in the squad, head coach Joe Schmidt has not called for a replacement with a hope that Henshaw can still be part of the tournament.
"Robbie pulled up with a tightness in his hamstring, he has a scan at 2pm today [Sunday] and that will give us more information," said Schmidt.
"I just have to wait for more news. I think the fact that he pulled up, he wasn't accelerating at the time, we'd be hopeful it's not too bad.
"Is it likely to rule him out of this week? Yeah you'd have to say it is likely, the fact that he did pull up.
"But we'd be hopeful it's not too bad. I don't want to guess when we'll get the scan this afternoon."
Ireland will kick start their World Cup campaign on 22nd September against Scotland in Yokohama following which they will also lock horns against Japan, Russia and Samoa.