Okore was impressive in Chelsea's victory in Demark this week.
"Of course I have already mentioned him to Sir Alex. I think everyone who has seen him play and have contacts at various clubs, has kept an eye on him," said Schmeichel.
"We always knew he was fast, and we have always known his strength. He is good in the air, but we've never seen him in this scene at this level, and the way he played, I was surprised that he could actually play the ball the way he did and take part in open games."