Adrien Rabiot has urged AC Milan teammate Rafael Leao not to waste his talent.
Rabiot arrived on deadline day from Olympique Marseille and has quickly been impressed by Leao - though believes he is not pushing himself enough.
He told La Gazzetta dello Sport: "I know there's a lot of talk about it. He's a player with potential, but at 26, you're no longer young. At his age, there's no time to waste. Time flies.
"It would be a shame if he remained just a potentially great player."
Rabiot continued: "I hope he realizes he has the means to compete with the best. But maybe he doesn't have the willpower or passion of a (Luka) Modric. Leao needs to ask himself where he wants to go, or if he's content with what he's doing, or if his goal is to become what he can be."
The midfielder then added: "It would be a shame for us, because it would be a waste if he didn't reach his full potential and focus 100% on his work. Allegri knows how to get the best out of players. I hope it has a positive impact on him too. Maybe this is the right opportunity for Leao."