Jurgen Klopp admits that he had a conflict with winger Jakub Blaszczykowski while at Borussia Dortmund but says that it ultimately inspired the Pole to become a hero for the club.
Blaszczykowski, 34, is currently playing with Wisla Krakow in his native Poland, the club he departed in order to join the Bundesliga outfit in 2007.
Initially the 108-time capped Poland international struggled under Klopp, who has moved on to become Liverpool manager, but the two became heroes of the club as they won successive Bundesliga titles and even reached the 2013 Champions League final, in which they lost out late on to Bayern Munich at Wembley.