Borussia Dortmund coach Jurgen Klopp has made it clear that if any of his players threaten to destabilise the harmony of the squad, they will be forced to leave.
BVB beat Bayern Munich to the Bundesliga and DFB-Pokal titles last season, and ahead of the start of the new campaign Klopp has warned that he would not allow individuals to stand in the way of his team's morale, citing the example of former striker Marcio Amoroso.
"If I have someone causing trouble, I will no longer let them play for the club," the 45-year-old said in an interview with Bild.
"The person would clearly not understand what our team stands for, and I would therefore have to separate them from the team.
"As such, we don't have players like Marcio Amoroso, who brought his own doctor and physiotherapist, any more."
"Something like that will not happen again. Whoever threatens the big picture can go."
Dortmund's next pre-season friendly is against Rot-Weiss Erfurt on Wednesday evening.