Barcelona whiz Gavi has no doubts about the potential of young teammate Lamine Yamal.
Yamal made his first team debut last season at the age of 15.
Gavi told Sport: "Lamine is a great player. It is true that he is still very young. I think he has to go little by little because he is young, but he will be a world top player in the future.
"I hope that they take good care of him."
Meanwhile, Gavi says his registration issues are now over.
He added, "Yes, I'm registered, there's no problem and I'm very happy to be at Bara."