Ron Dennis showed little sympathy for Christian Horner at a recent meeting of the F1 Commission, telling the Red Bull boss to "suck it up" when confronted about his decision to block a Honda engine supply deal.
Dennis vetoed a possible Honda customer deal with Red Bull because he wants the Japanese manufacture to remain focused on McLaren next season. After falling out with current supplier Renault earlier in the year, Red Bull has renegotiated a deal to continue with the French manufacturer in 2016, although exact details of the agreement remain unclear.
When asked by Sky Sports if he told Horner to "suck it up" at the meeting ahead of the Abu Dhabi Grand Prix, Dennis replied: "Those were the words.
"Some of what Christian has been experiencing at the moment is self-inflicted. He's obviously been lobbying hard, as you would expect him to, along different paths to achieve a better position for him and the Red Bull team.
"I understand that, but the real issue is what the teams have to do to make the future of grand prix racing better and we all have, as do the manufacturers in F1, a very strong desire to try and address some of the issues."
Dennis said he gained the support of Horner at the meeting when he challenged the sport's current owners CVC Capital on the future direction of Formula One.
"Everybody has to come to the party and that particular comment about Donald Mackenzie at CVC...after that comment, [Horner] was very complimentary about what I said and even how I said it.
"Everybody's got to come to the party. They make a great deal of money from motor racing and they need to put a bit more back into the sport at critical moments - and the critical moment is keeping Renault and keeping the Red Bull team supplied with engines. It's as simple as that.
"Without question, everybody was complimentary about my contribution to that meeting. So I don't feel at all bad about it."