Ireland coach Joe Schmidt fears that Paul O'Connell's international career may be over after his captain was forced off with a serious-looking leg injury in the 24-9 victory over France.
"It doesn't look great with Paul. It looks like an upper hamstring but we will probably have to wait until Monday to give it a scan," said Schmidt.
Fly-half Johnny Sexton is also set for a scan on a groin strain.
Peter O'Mahony suffered a suspected knee injury but is less of a concern.
Lock O'Connell, 35, is leaving international rugby and joining Toulon after the World Cup - having won 108 caps.
In addition to the injury worries for next Sunday's quarter-final against Argentina in Cardiff, flanker Sean O'Brien could face a citing for an alleged punch on Pascal Pape.
In addition to the injury worries for next Sunday's quarter-final against Argentina in Cardiff, flanker Sean O'Brien could face a citing for an alleged punch on Pascal Pape.
