The Reds boss gave the German his first taste of European football while they were both at Dortmund and the midfielder is eternally grateful
Manchester City midfielder Ilkay Gundogan feels indebted to Liverpool manager Jurgen Klopp for moulding his career, with the two set to meet in the Champions League on Wednesday.
Gundogan enjoyed a successful stint under Klopp at Borussia Dortmund, whom he joined from Nurnberg in 2011.
After a slow start to life at Signal Iduna Park, Gundogan went on to become a pivotal part of Klopp's Dortmund side, helping them win the Bundesliga in his first season and reach the Champions League final the following year.