Jurgen Klopp has apologised to Jupp Heynckes and Bayern Munich after accusing the club of merely buying their success following Borussia Dortmund's 1-0 cup defeat to the Bavarians.
Klopp's incendiary comments came after seeing BVB crash out of the DFB-Pokal thanks to Arjen Robben's first-half strike, a defeat which prompted the 45-year-old to attack die Roten's methods.
"At the moment, it's a bit like what the Chinese do with industry. They look at what the others are doing and imitate it, but with more money and different players," the former Mainz trainer complained.
Heynckes retaliated: "It's very important to show dignity in victory, and especially in defeat," the former Real Madrid boss retorted.
Klopp has since backtracked on his initial remarks and, speaking after the club's 3-1 win over Hannover, appeared to offer his apologies.
"The last thing I want is to criticise a renowned colleague," he told WDR2-Radio.
"Jupp Heynckes is an excellent coach. If needs be, I will gladly apologise. So, Jupp, if you can hear me, I'm sorry!"
Borussia Dortmund sit second in the Bundesliga after victory against Hannover with 46 points from 24 games, though still 14 points behind league-leaders Bayern.