Don't be too excited just yet, guys.
Yes, the kid has some good skills. He has a very good left foot, is a classy AM who looks fairly intelligent.
BUT. I'm sorry to say this, but he is slow and soft as hell =(
And yes, his U20 tournament was awful. Just like the majority of the other players, actually. But I'd seen him playing for Flamengo before and his slowness really caught my eyes.
Nowadays it's VERY VERY TOUGH for a slow and soft player to have a successful career in modern football. Let's see if he can at least toughen up a bit. The talent with the left foot is there, on the other hand. But I wouldn't raise great levels of expectations for him.