UEFA are believed to be considering two-year Champions League bans for those clubs that were involved in the European Super League proposals and have not yet definitively distanced themselves from the plans.
That is the strongest punishment available for the organisation to give out, and would see those clubs barred from competing in either the Champions League or Europa League.
According to ESPN, seven of the clubs involved in the project - all of the English sides and Atletico Madrid - have been in contact with UEFA over the last 10 days and have reached an agreement with the organisation after talks which centred on lesser sanctions for those willing to formally move away from the Super League.