Spalletti has signed to the end of the season after replacing Igor Tudor and has managed to revive the team, with the Bianconeri sitting in fifth place on the Serie A table.
Ravanelli told Tuttosport: "Spalletti? We can start a new era with him. I don't see any other coaches these days. I haven't seen a Juve like this in many years: I'm struck by the retaliation.
:He's the captain of this ship. His contract? I think it should be renewed immediately. He should be tied to the gates of Continassa: I repeat, I can't imagine a Juve without Spalletti."
Juve meet Benfica in the Champions League tonight and the White Feather added: "The team is doing great, they're playing great football.
"If the playoff schedule is kind, they could become a nice surprise in Europe too, after having made a thrilling comeback in the league."