Atletico Madrid youth coach Jesus Adolfo Marcos has recalled working with Manchester United superkid Alejandro Garnacho.
Although there were no doubts about Garnacho's ability, ones about his attitude were growing, and it needed a more experienced head to step in.
Marcos, still a key figure at the club, revealed to The Sun: When they moved me I thought I was being demoted, but was told it was actually a promotion.
They wanted me to coach the best young player at the club. That was my mission and also my biggest challenge.
Alejandro was a 'street boy,' from a suburb of Getafe, and straight away we decided to move him to the academy hotel, because he was not a good student.
He was smarter than the rest of the boys, but became problematic...he was a rascal and creating war inside the hotel.
He'd sneak food into the room, sweets and stuff, and would hide his phone and be on it late at night. He was also top of his group at breaking the rules!"
And when Garnacho, then only 15, played his first game under his new coach, it was far from an auspicious start he hardly had time to break sweat before he was hooked.
Marcos said: We were away to Rayo Majadahonda and I was forced to take him off after ten minutes. There was clearly an attitude problem.
His instructions were to run and make an effort because they pressed a lot but Alejandro was hopeless and effortless.
I substituted him and in the first attack without him we scored, ended up winning 6-0 and the whole coaching staff was expecting a negative reaction, complaint or indiscipline.
But it was the total opposite. Alejandro reacted with an incredible maturity, didn't complain and worked very hard all week.
He is an intelligent boy who knew he was in the wrong anddidn't have any grounds to kick up a fuss. He has that thing special players have they can be a rebel."