This is for a lot of thought.... First ones comes in mind is Adriano. Also Denilson, Quaresma and Krkic Bojan. Others were Kerlon, Deiler, van der Meyde.
Mutu had also a lot of potential

This is good article for 30 wonderkids who flopped

Football's brightest wonderkids who flopped

In a game where the obsession is to see youth stars rise to the top and fulfil their potential at the elite level of the game, the truth is that it's not all th

www.90min.com

Hachim Mastour is no1, never heard of him

 

It is not sufficient to know how to do some tricks with the ball in order to be a professional football player. Mastour is the perfect example of what I'm stating. I think that putting him in the same list with players who were pretty good professionals such as Giuseppe Rossi is wrong.

 

Flop in club but vital in NT....Gio Dos Santos

 

Krkic was a better talent than Messi

😁

 

There was a player in the youth teams of Bologna, Marco Macina, someone pretended to be better than Roberto Mancini, who was also in the youth team of Bologna, but while the latter had a formidable career, the former didn't live up to the hype.

 

Just checked about him on wikipedia. From San Marino

 

I guess this makes him the greatest Sanmarinese player ever. (Even if he only played 2 matches for them).

 

Never mind, apparently they had a legit top player who partnered Platini in Juve midfield in the 1980s.

https://en.wikipedia.org/wiki/Massimo_Bonini