The youngster's deal carries a €9 million buyout clause.
“Alejandro would very much like to wear the Napoli shirt, it's one of the greatest clubs in the history of Italian football.
“We've already found an agreement for the contract and wages, and I'm sure the clubs will find the right solution.
“How long until the deal is done? You know how it is in football, what you can't manage in a month can be done in three hours."