Many footballers fail to make the transition into senior football after initially impressing at youth level.
The likes of Barcelona superstars Xavi and Andres Iniesta make it to the top, while some, like Freddy Adu, don't.
Here in this piece, we'll see the players who many reckon to be the super stars of tomorrow.
This article will outline the world under-21 best XI.
Write for GiveMeSport! Sign-up to the GMS Writing Academy here: https://gms.to/130seMa
DISCLAIMER: This article has been written by a member of the GiveMeSport Writing Academy and does not represent the views of GiveMeSport.com or SportsNewMedia. The views and opinions expressed are solely that of the author credited at the top of this article. GiveMeSport.com and SportsNewMedia do not take any responsibility for the content of its contributors.