Barcelona's famed academy is probably the best known throughout the world.
La Masia—literal translation "The Farmhouse"—has been an integral part of the Barca model since Laureano Ruiz took the reins in the early 1970s.
Johan Cruyff is often credited as the architect of the Barca way of playing that we see today, and his insistence that all Barca teams play the same way, from the youngest to the first team, has certainly paid dividends.
"Tiki-taka," as Cruyff's style has come to be known, is copied worldwide, but never bettered, and some of the best exponents of the style have grown up in La Masia.
But what of those for whom great things were predicted but never quite materialised?
Let's take a look at 20 youngsters that didn't make the grade at Camp Nou.