Ulster’s Nick Williams is expected to be out for up to eight weeks after he sustained medial ligament damage to his left knee during the Heineken Cup win over Glasgow on Friday.

The injury was assessed on Monday and his absence from competitive action was confirmed. However, Williams will have time on his side to be fit for Ulster’s Heineken Cup quarter-final which takes place in early April.

Out-half Paddy Jackson was assessed on Sunday for an ankle injury he picked up against Glasgow, as was winger Craig Gilroy who suffered a bang to the head on Friday last.

Jackson’s ankle is responding well to physiotherapy treatment, while Gilroy is following the necessary return-to-play protocol.

It is hoped that both players will be available for selection for this weekend’s Heineken Cup game against Castres Olympique.