Juventus legend Alessandro del Piero says they must keep hold of Arturo Vidal.
Del Piero gave President Andrea Agnelli some advice on the Vidal situation, as reports suggest Manchester United offered 45m for the Chile midfielder.
"Juve's value will be decided by what they can build now, the objectives they set themselves and how the transfer market pans out.
"Obviously, I am thinking of Vidal. It's not that he is irreplaceable, but a great deal does change if he's there or not.
"If you do decide to sell, then you need to spend that money wisely. You have to buy someone just as strong, although probably a pair of players, seeing as Vidal runs for two.
"His departure would change the balance of the team, even though a midfield with Pirlo, Marchisio and Pogba would still be very impressive.
"I also think the worth of this Juve will be given by their opponents. Last season broke records and that won't happen again. It developed that way because Juventus are strong, but also as other teams were renovated."
