Bayern fans who were arguing with expensive tickets have caused trouble for the Munich club.
UEFA announced that due to an incident at the "Constant Vanden Stock" stadium on November 22, the German team was fined 20,000 euros.
During the Champions League match between the Brussels and Bayern teams, visiting club fans raised a banner and threw fake euro banknotes into the field.
The Germans were angry about the 100 euro tickets to the prestigious league matches.
UEFA also fined the Moscow Spartak team 3,000 euros for the use of pyrotechnic devices by their fans during the match against Maribor.
