Jurgen Klopp once revealed his frustration over how Sir Alex Ferguson trested a former player of his at Manchetser United.

Jurgen Klopp has named three footballing superstars he regrets not signing while at Borussia Dortmund - before they all went on to bigger things in the upper echelons of European football.

Klopp enjoyed phenomenal success at Dortmund, crowned by back-to-back Bundesliga titles in 2010-11 and 2011-12.

Jurgen Klopp’s Red Bull Role Sparks Outrage Among Dortmund FansThe footballing world was stunned when Jurgen Klopp, one of the most beloved figures in German football, announced his new role ...

Jurgen Klopp returned to management for the first time since leaving Liverpool 57-year-old took charge of a testimonial to honour his former Dortmund players SOCCER A-Z: Listen now wherever you ...

For that, total concentration is needed.' Dortmund came from 2-0 down to earn a 2-2 draw against Stuttgart in September's league meeting.