The sides from across the continent with the most academy players.
Bringing players through from the academy and turning them into first team stars is one of the most highly respected things a football club can do.
After former Liverpool ace Alan Hansen famously said that Manchester United would never ‘win anything with kids,’ the youth comibantion of David Beckham, Nicky Butt, Ryan Giggs, Paul Scholes and Gary and Phil Neville helped the Red Devils achieve the treble in 1999.
As the sport progresses more emphasis seems to be given to expensive transfers, but with the Finacial Fair Play ruling now in practice from UEFA, developing youngsters could become more and more common at top sides.
Here are the 10 teams currently playing in Europe with the highest percentage of 15 to 21-year-old’s who have been at their club for three or more seasons – data courtesy of Football Observatory.