#3 Dieter Hecking
League minutes played by U-23 players: 25.1%
German boss Dieter Hecking has managed a number of clubs in the past decade. From Hannover 96 to FC Nurnberg to VfL Wolfsburg, the 53-year-old is now in charge of Borussia Mönchengladbach.
At Hannover, he trusted former defenders Håvard Nordtveit and Dennis Diekmeier, midfielder Ilkay Gundogan, and forward Eric Maxim Choupo-Moting - all of whom made more than 20 appearances a season.
It was at Wolfsburg where he really turned heads, taking them to the Europa League and even the Champions League where they almost knocked out Real Madrid.
Ricardo Rodrigues, Robin Knoche, and Maximilian Arnold were heavily involved while Kevin De Bruyne had 10 goals and 20 assists in his final season at the club. His final season at the club also saw the rise of Julian Draxler.
At 'Gladbach, he has so far tried to put his faith in Denis Zakaria and Nico Elvedi (both 21) while 18-year-old midfielder Michaël Cuisance is one to watch out for.