Borussia Dortmund fans have made their opposition to Champions League reforms clear with a huge tifo blasting European soccer’s governing body UEFA. The supporters displayed the words “UEFA mafia” behind one of the goals before Tuesday’s match against Scottish team Celtic,

Celtic’s unbeaten start to the season comes to a shuddering halt as they are taught a Champions League lesson by a rampant Borussia Dortmund.

Borussia Dortmund are likely to face sanctions after displaying a banner reading “UEFA Mafia” before Tuesday’s Champions League tie with Celtic. The nine individual letters spelling out the message were held up by supporters in the ‘Yellow Wall’ at the Westfalenstadion,