Roberto Donadoni: What’s his deal?

As everyone knows by now, Roberto Donadoni was relieved of his duties as Napoli manager and was replaced by former Sampdoria boss Walter Mazzarri. We can't deny that Donadoni was one of the greatest wingers Italian football has ever produced. But his managerial career so far? Not great. We really don't know where Donadoni is at as a manager or if he will ever improve.