Tempers boiled over on Wednesday at Bayern's early-morning training session when midfielder Goretzka went hard into a tackle and defender Boateng retaliated - the pair being swiftly forced apart by teammates.
Both players later took to social media to make light of the matter, posting photos where they are grinning broadly as Goretzka lands mock punches on his teammate's chin.
"It's clear that I don't want to see this kind of behaviour in the team, because we have certain values," said Flick firmly in a press conference.
"I don't expect this kind of emotion again". Although Flick wants no repeat of the altercation the 54-year-old said he would not punish the duo.