Milan legend Marco Van Basten thinks Leonardo has betrayed the club by joining heated rivals Inter.
Leonardo accepted the offer to replace Rafa Benitez despite his 13-year history with Milan.
Speaking to Sky Italia, Van Basten said: "It's not right to pass from one family to another. Wouldn't it be a betrayal?
"In my case, yes. I was at Milan for many years. I found myself happy. In my opinion even Inter understand this way of thinking."