Dan Biggar is out of contention for Wales’ final World Cup group game against Uruguay on Sunday.
And Wales could be left sweating on his prospects of facing likely quarter-final opponents France in 11 days’ time.
Centre Jonathan Davies, meanwhile, might also need close monitoring following a punishing Pool D encounter with Fiji that Wales won 29-17 to book a last-eight place.
“We came here with very high aspirations, and we did really want to get to the play-offs (quarter-finals).
“That was one of our objectives, and we haven’t achieved that, and we are disappointed.
“Having said that, the World Cup is a competitive environment and it’s very difficult to progress from the pool stages for any team. We can go away from this tournament with our heads held high.”