Eddie Patterson admits goalkeeper Elliott Morris may need a period of rest if he is to fully recover from a persistent back injury.
Morris struggled to get through Wednesday’s derby defeat to Linfield – Glentoran being denied a point by Aaron Burns’ 95th-minute winner for the Blues.
A goalkeeper crisis could unfold at the Oval if replacement cover is not found.
Morris’ deputy Aaron Hogg is currently sidelined with a rib injury.
“Elliott is struggling now. He hurt his back a couple of weeks ago, but he has kept going with a couple of pain-killing injections,” Patterson said.
“But it is getting to the stage where he can only have so many injections before enough is enough.
“He has some muscular damage which requires some rest. We may well have to look at bringing someone in.
“Aaron Hogg is injured at the moment, and the young keeper we have in the reserves is so inexperienced that I wouldn’t take a chance on him. So we will put a few feelers out and take it from there.”
Meanwhile, Patterson said talks with Cliftonville over the transfer of Ciaran Caldwell have reached standstill.
“We put an improved offer in last weekend which was turned down. Whether we go back or not remains to be seen,” he added.
“We will see what happens.”