The dual A-League Goalkeeper of the Year currently has a hand injury which could force him out of the vital fixture which has the Reds going in on the back of a three-game losing streak.
What's worse is that skipper Travis Dodd and left-back Cassio are also both in doubt with leg problems which has given coach Rini Coolen a slight headache.
"He (Galekovic) is not 100 per cent fit at the moment. We've had a program for him to see if he can play as many games as he can, that's what he tried and at the moment he's not at the same level that he was," the Dutchman said yesterday.
"There are a few decisions for me to make, so we'll wait until tomorrow and I'll be able to speak more about that situation. We have to think what the best for the team is and more importantly what's the best for Eugene. I am real happy that he's played as much as possible and I'll make a decision tomorrow after speaking to the doctor.
"He needs some rest but I need to work out which moment is the best time to do it.
"There are a few players like Travis Dodd, more than likely he won't be ready for the game but we'll see what happens," Coolen added.
"Also for Cassio, he got a knock to his leg. He'll have an individual training session tomorrow, so we have to see if he's available, and if he is available, I have to think about if it's smart to let him play because we have another game on Sunday, so they're decisions I have to make tomorrow."