The close bond between Borussia Dortmund's players and supporters comes from the club's 'clear and obvious strategy' to develop homegrown players rather than buy superstars, according to their head of youth Lars Ricken.
England star Jadon Sancho, 19, is the best current example of Dortmund's commitment to youth after they signed him from Manchester City in 2017 and promoted him quickly to their first team.
Now Sancho is being linked with a big money move back to the Premier League this summer, with Manchester United, Chelsea and Liverpool all linked with the player.