Hansi Flick is presented with a poster of his achievements at Bayern Munich by chief executive Karl-Heinz Rummenigge before his final game in charge of the Bavarian club in May. AFP
Hansi Flick is presented with a poster of his achievements at Bayern Munich by chief executive Karl-Heinz Rummenigge before his final game in charge of the Bavarian club in May. AFP

Thomas Tuchel, Jurgen Klopp, Julian Nagelsmann and why charisma is key to success of German football managers