Flick reprimands Boateng, Goretzka for training ground scuffle

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 on Friday. "I don't expect this kind of emotion again."

Champions Bayern are just a point behind Bundesliga leaders RB Leipzig ahead of Saturday's trip to Mainz, and although Flick wants no repeat of the altercation the 54-year-old said he would not punish the duo.

"Why should I? Basically, I don't think much of punishments and this was the first time something like this has happened to me," he said.

Flick added that he had phoned both players after the incident and told them to "solve things verbally". With defender Lucas Hernandez and winger Kingsley Coman returning from injury, Flick said any further last-minute transfers are unlikely after already signing right-back Alvaro Odriozola on loan from Real Madrid.