Alba says comparing Vinicius Junior with Barca captain Leo Messi is way too premature.
He said: "In the end we're comparing him to the best in the world...bloody hell!
"Vinicius is a great player," he continued, "I have never said anything bad about him... We have to be sensible about it, we have to be honest.
"He is a fantastic player, one who is giving a lot to Madrid, despite his tender age. It is not easy at a huge club like Real Madrid that a kid, just 18 years old, to be creating the chances and be one of the stars in every game. That is not easy.
"But the comparison [with Messi] does not do him or anyone else any good."