Real Madrid legend Roberto Carlos is backing Vinicius Junior to be a star.

The Flamengo whizkid is on-loan from Real this year.

"I was with his family before El Clasico and they're all very humble," Roberto Carlos said to reporters.

"He knows that playing at Real Madrid is not going to be easy because the [Estadio Santiago] Bernabeu is very big and the fans demand a lot.

"Being a Real player must be a source of great pride for him, but now he has a greater responsibility to improve day by day.

"I wish him luck and I'm sure he will be an idol at the club soon enough."

Expectations will be nothing like Vinicius has ever experienced before, though Roberto Carlos thinks that the player will adapt and evolve over time.

"I won't say that he's ready yet because he's still very young," he continued.

"But what Real Madrid did in thinking about the future of the club... I think it was a perfect move.

"They will accelerate Vinicius' process of growth both as a player and as a human being."