David Trezeguet believes "world-class" Adrien Rabiot can be an "important player" for Juventus with the midfielder's future uncertain.
Rabiot has just returned from an impressive World Cup, where he helped France reach a final they lost to Argentina on penalties at Lusail Stadium last Sunday.
There are reports that Juve could sell the midfielder in January to avoid him departing on a free transfer when his existing contract expires at the end of the season.
Former Juve and France striker Trezeguet feels the ball is in his former club's court.
"[With Rabiot] we are talking about a problem for Juventus because in Italy, he may have been targeted for criticism, but in France, it's completely different," he told Sky Sport Italia.
"He is world class, an extraordinary player. Now, he will evaluate his options and will go back to being the important player he always was.
"Juve will have to be a protagonist, that is what their history commands, and the players shouldn't worry about what is happening off the field.
"They'll have [Angel] di Maria back and fired up as a world champion with Argentina, while [Paul] Pogba and many others can give something extra."
Trezeguet also gave his thoughts on former team-mate Didier Deschamps, whose future as France head coach is uncertain with Zinedine Zidane reportedly a potential replacement.
"Didier has a very good rapport with the president of the federation, so he will take his time and come to a decision," said Trezeguet, who won the 1998 World Cup and Euro 2000 alongside Deschamps.
"If he decides to leave, then he'll see what to do in future."