Mainz have found themselves in hot water with the German Football Association (DFB) after fans set off smoke bombs versus Borussia Dortmund.
Mainz have been fined €7,500 by the German Football Association (DFB) for the "unsportsmanlike conduct" of their fans during last month's defeat at Borussia Dortmund.
Smoke bombs were let off by supporters in the 46th minute of the clash at Signal Iduna Park, blocking the view for some of the travelling fans.
The DFB has taken a dim view of the incident and subsequently sanctioned Mainz for the disturbance.
Mainz, who were leading 1-0 at the time, went on to lose the match 4-2 - with Marco Reus playing a pivotal role with a goal and an assist for Jurgen Klopp's men.