Ulster back-row duo Stephen Ferris and Nick Williams are still in contention to face Glasgow Warriors this Friday after being named in Mark Anscombe’s provisional 28-man squad.

The pair missed the 41-17 win over Castres at the weekend, but Ulster are hopeful that they will be fit for this Heineken Cup Pool 4 clash at Scotstoun.

Ferris is responding well to treatment on his back, while Williams (ribs) will also be given as much time as possible to prove his fitness.

Outhalf Niall O’Connor is included in the preliminary squad after his impressive performance for the Ulster Ravens in the win over Bridgend on Saturday.

Roger Wilson played 40 minutes against the Welsh outfit, but he will not be rushed back into action with the senior side.

Robbie Diack and Declan Fitzpatrick have returned to training this week following injuries, but will not be considered for this weekend.