Former Real Madrid striker Fernando Morientes says Jude Bellingham must be mentally tough to play for the Los Merengues.
Bellingham has joined Real Madrid from Borussia Dortmund this week.
Morientes told Radio Marca: "The important thing to make the leap is talent and mind.
"Having that responsibility and that head, everything that entails. With all due respect, playing for Dortmund has nothing to do with playing for Madrid, and you don't realise that until you arrive.
"It's the only uncertainty. I think that because of the progression he has, it gives the feeling that he could be a player for a long time."
