UEFA president Alexander Ceferin has promised to punish participants in the Super League and says that any players involved "will be banned from the World Cup and Euros".
The announcement of a new European competition that would see a number of top clubs break away from the Champions League has been met with fierce opposition over the past 24 hours.
UEFA have now revealed their stance, with Ceferin calling for the football world to rally against the "cynical plan" that is threatening to cause huge division across the continent's major leagues.