Bayern Munich general manager Uli Hoeness has hit out at Hoffenheim coach Ralf Rangnick, claiming he could be preventing the club from getting even better.
Bayern beat Bundesliga leaders Hoffenheim 2-1 last Friday thanks to a goal in the second minute of stoppage time from Luca Toni, but the build-up to the game was dominated by verbal exchanges between the two sides.
And Hoeness has now continued the war of words with an attack on Rangnick.
He told DSF television: "Up to now, Ralf Rangnick has always experienced a good first year and then been sacked afterwards.
"He will still discover the air at an altitude is a lot thinner than the air he is currently enjoying.
"If there is anything that worries me about the positive development of Hoffenheim, then it is Ralf Rangnick's know-it-all attitude."
Hoeness also accused Hoffenheim owner Dietmar Hopp of buying his way to glory.
"I respect Dietmar Hopp as a person a hell of a lot and I rate what he is doing," continued Hoeness. "But if Hopp took his money and invested in Bielefeld tomorrow, then they would be playing at the top.
"FC Bayern are playing against a billionaire - it is not small against big financially speaking.
"They have done some sensational work, but without the financial support, they would still be in the second or third division.
"You can only employ scouts when you have the money for it."