There has been talk Ranieri will be shown the door should they lose to Catania this weekend.
"I heard that said about all the games," Moratti told Telelombardia.
"That is not the case. When you put faith in someone, you do it, and naturally there is the hope that things will go well.
"It is very important to do well and Ranieri knows that too. Everything is certainly not tied to a single match, but at the moment every game weighs very heavily if it goes badly."