Jurgen Klopp said he told the fourth official that "no one can beat us" after Chelsea missed a late penalty in the 1-1 draw at Liverpool on Tuesday but apologised for his behaviour.
Chelsea won a penalty when Diego Costa tangled with Joel Matip but Simon Mignolet saved the Spain international's 77th-minute spot kick, prompting celebrations from the Liverpool boss.
Klopp said he had been "a little angry" that referee Mark Clattenburg had not stopped the play in the build-up to the penalty for what he felt was a foul on Dejan Lovren and, after the match, he revealed the content of his exchange with fourth official Neil Swarbrick in the technical area.