Former Liverpool and Bayern Munich midfielder Didi Hamann has questioned the hype around Borussia Dortmund midfielder Jude Bellingham.
Bellingham is a target for Liverpool and Real Madrid this summer.
But Hamann told Sky Sports: "What Bellingham doesn't have is discipline.
"He may want to return to the island [England] or Real Madrid. He has to play differently.
At Dortmund he can do what he wants. Nobody dares to say anything.
"Because they're afraid of upsetting him. If you have that as a team-mate, you'll have a problem.
"If he doesn't do anything forwards and backwards, what does he do then? Obviously he is an exceptional player. But he has to get his discipline under control."
