Marco Branca has slammed Roma after the sacking of Jose Mourinho.
The Friedkins axed Mourinho this week after defeat at AC Milan on the weekend.
Branca won the Treble with Mourinho and told Radio Kiss Kiss: "In recent years, many owners have been introduced into football who are ignorant of the matter and often make mistakes.
"The world of Italian football is different from all other worlds and is not easy to learn, there is a lack of competence."
On Napoli, he added: "I expected difficulties after the Scudetto, he no longer has the coach with whom he built certainties and not even the sporting director. (Cristiano) Giuntoli is part of that category of directors who not only make transfers, but know how to manage players and presidents."
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All the best attacking coaches of this world have not been able to break Mourinho's Real Madrid highest league goals (121) scored in a season record. Ironic for a defensive coach.