It had been assumed that Sunday would be too early for a return to action following the injury he sustained at Anfield, but Glenn says:
"He has had the operation and come through it sucessfully; they have repaired the small fracture that he had on the cheekbone and we will just see how he comes on in the next few days.
"They have made a protective mask for him that other players in the past few years have played in; we will have to see how he is on Friday and Saturday before making a decision about whether he plays on Sunday.
"He was in a lot of pain after the game but at the moment he was very positive about the idea of playing with a mask - and that is just the attitude you want.
"The main thing is to see how he recovers from the operation."
Club doctor Ges Steinbergs says that Trevor now needs rest and adds:
"He had the operation yesterday evening on the right cheekbone, the Zycoma, and is feeling fine.
"A small piece of bone was lifted out, it went successfully, and he was discharged this morning.
"Sometimes the operation is complicated and wires are needed but thankfully that has not been the case.
"He will need four days to recover, having had a general anaesthetic; he will go for a fitting of the mask tomorrow, and hopefully, if it fits, he will be able to wear it.
"This will ensure that the cheekbone won't be pushed in; all he needs is protection as there was no concussion and no head injury.
"The bone is just off the skull but fortunately it was not a deep injury.
"We haven't decided on the colour yet, but hopefully Trevor, with his liking of alarming colours, won't get to choose!"
Paolo Di Canio was an absentee on Saturday - with good reason - and Ges says:
"We all know that groin injuries can be niggling and it would not have been sensible for him to play at the weekend."
As for Don Hutchison, Ges adds:
"Don is back in training and it is important we keep his rehabilitation going."