Wales skipper Ashley Williams faces an anxious wait to see if he will play any further part in his side's Euro 2016 campaign.
The Red Dragons are into the quarter-finals of the competition after a memorable run that has so far seen them top Group B and overcome Northern Ireland in the first knockout round.
Williams was left in serious discomfort in the 1-0 victory over Ireland on Saturday, however, as a collision with teammate Jonny Williams left him needing on-field treatment.
Despite refusing to leave the pitch and instead playing on for the remaining 10 minutes, the Swansea City defender is seen as a major doubt for the meeting with Belgium in Lille next week due to the shoulder complaint.
Williams underwent a scan on Sunday but is still waiting for the results, which are now not likely to be revealed until Monday morning.
Should the 31-year-old be deemed unfit to play, James Collins is the favourite to fill in at the back for a Wales side that has kept clean sheets in successive games.
