Jose Mourinho joined his successor at Old Trafford in rubbishing Jurgen Klopp's complaints after the league leaders lost their 100% record on Sunday.
The Liverpool manager criticised United's tactics and said their opening goal should have been ruled out for a foul, receiving a response not only from his United counterpart Ole Gunnar Solskjaer but also the man who was in charge of the club until he was sacked in December last year.
Klopp had made some pointed comments about the way Solskjaer set United up with a 5-3-2 formation and the way they focused on frustrating his side, who had won all eight of their previous matches in the Premier League.
"Man United had momentum in the first half because they were purely there to defend us," said Klopp, who has yet to win at Old Trafford with Liverpool.
"Since I'm in England Man United always played like this," he continued.
"I’m not the person who should be frustrated by United’s style. In the last years they just defend, that’s how it is, it’s no criticism, it’s just a fact," he added.
"When you think United v Liverpool you think both teams attacking, but it’s not," he said.
Solskjaer rejected the suggestion his team were defensive saying they had been set up to pressure and attack and he received some support from his predecessor, who was more than once accused of 'parking the bus' at Anfield.
Mourinho said Klopp had clearly not enjoyed the way United made the game difficult for Liverpool.
"He didn’t like the menu. He likes meat and he got fish. so he was not happy," said Mourinho, who noted that Solskjaer's tactics had worked.
"They are of course much stronger against opponents who give them a chance of transitions and counter-attacks. United didn’t do that. And he didn’t like the menu.”
"They were organised, they had a plan. You can agree or disagree, but they had a game plan, they stuck to it.
"If I was Ole I would be proud, and a little bit frustrated, because I think the boys, they gave everything," said Mourinho who had heard his name sung by United fans in the Stretford end.
Klopp was also upset that referee Martin Atkinson had not seen what he considered a foul by Victor Lindelof on Divock Origi at the start of the move that led to United's goal.
The German was annoyed that VAR had not overturned the goal but Solskjaer, unsurprisingly perhaps, felt the referee was correct in his verdict. "Foul? No chance, we're not playing basketball. He touched him but it's not a clear and obvious error," he said. (Reporting by Simon Evans; editing by Clare Lovell)