De Laurentiis insists the club doesn't need to buy big names to be successful.
He said: "I really like Cassano, but he is not a player who would fit in with the plans for this club. I want professionals who give their all every week. It's not enough for them to be fantastic on occasion."
The movie mogul added: "I know that in January the fans wanted a well-known striker, but I like to buy players who are hungry for success, not when they're already sated."