The Bayern Munich chairman voices his dismay with the Borussia Dortmund coach's disparaging remarks about the Bundesliga champions' sporting director's contribution
Klopp made headlines with his remark that Sammer "should thank God that he's working at Bayern", arguing that the Bavarians' sporting director contributes little or nothing to their success.
But Rummenigge came to Sammer's defence, declaring that the BVB boss had crossed a line.
"At first, I was shocked when I came across that sentence and then I got upset," the former West Germany international was quoted as saying by Welt am Sonntag.
"Matthias won the Champions League with Dortmund during his active career and then the Bundesliga title as a coach.
"Nobody at Bayern would ever be allowed to make such a comment about someone with a past at Bayern and is now a Dortmund employee."
Sammer joined Bayern in the summer of 2012 and saw the club win a historic treble in his first season at the Allianz Arena.