Ilkay Gundogan has praised former coach Jurgen Klopp but described his Manchester City boss Pep Guardiola as "the best in the world."
Germany international Gundogan won the Bundesliga and DFB Pokal double under Klopp at Borussia Dortmund in 2012 before they reached the Champions League final the following season.
Klopp left the Bundesliga side last season to join Liverpool and Gundogan has now followed him to the Premier League but the pair won't come up against each other until Dec. 31.
"Both are world-class managers with their own qualities," Gundogan said of Guardiola and Klopp in City's matchday programme.