Manchester City boss Pep Guardiola says he "encouraged" his side to celebrate Sunday's 2-1 win at Manchester United, but denies they went over the top.
United manager Jose Mourinho had milk thrown at him outside the Old Trafford dressing rooms after objecting to City's celebrations.
Asked if his players went too far, Guardiola said: "No. Definitely not.
"We were happy. We won a derby against Manchester United, one of the best rivals we have."
City's players initially celebrated Sunday's victory in front of their fans, and coaching staff tried to persuade Guardiola to join them, but he refused.
After the players and staff headed down the tunnel, it is understood Mourinho complained outside the visitors' dressing room as he made his way to interviews.
In the ensuing row, the Portuguese had water and milk thrown at him while City coach Mikel Arteta suffered a cut head after he was hit by a plastic drinks bottle. It is not known who threw it and sources from both clubs say no punches were thrown during the incident.
Guardiola said: "We celebrated. I think if United win a derby, they celebrate.
"But where? Inside the locker room. That's what we tried to do and we did.
"People have to understand that we were happy. I think all the teams around the world when they win a derby, they are so happy."
The Football Association said on Monday that both clubs have until Wednesday to reply to a request for their observations of the incident.
"After what happened, hopefully, it cannot happen again," said Guardiola. "What happened we will explain to the FA investigation. United will do the same.
"We will make a statement to the FA. I am not going to comment about that."
City's victory - a record 14th in a row in the league - took them 11 points clear of United at the top of the table.
Mourinho, appearing at a news conference before Wednesday's game against Bournemouth, would not comment on what Guardiola had said.
He added: "The only thing I can say is that for me was just a question of diversity - diversity in behaviour, diversity in education, just that and nothing more."