Iheanacho has been to see a specialist over the injured toe that threatens to keep him out of Leicester's game against Brighton.
Craig Shakespeare revealed the problem, picked up in the pre-season friendly against Borussia Monchengladbach, continues to cause issues for the £25 million striker.
Iheanacho came off the bench to play the final eight minutes of the opening night defeat at Arsenal but may be ruled out of Saturday's fixture.
Shakespeare said: "He didn't train on Thursday. He's had a bit of discomfort with his toe so we've taken him out. I'll make a late decision tomorrow morning.
"He's been to see a specialist. He can run but not a full pelt. Striking a ball, if he catches it wrong on the toe, it's a problem. So sometimes, he's getting a lot of discomfort. So we're trying to manage that as best as we can.
"We're trying to give him enough time to recover. It's been very hard because he's been behind the fitness levels of the others because of his late start with us. So we're giving him every opportunity to get his fitness levels up."