City are accused of overstating sponsorship revenue to hide that they had not complied with Uefa’s financial fair play (FFP) rules between 2012 and 2016 and were also handed a 30 million euro fine.
Uefa’s case was prompted when German magazine Der Spiegel published a series of leaked emails in 2018 that purported to show how City manufactured extra sponsorship revenue from a series of companies with connections to the club’s Abu Dhabi-based owner Sheikh Mansour.
However, billions of investment in players and managers has not yet been able to deliver the club’s first-ever Champions League title.
City are still involved in this season’s competition and will be allowed to compete should the 2019-20 edition of Champions League return in August no matter the outcome of the appeal.
But a two-season ban from the competition would represent a huge blow to the club’s prestige, finances and hope of hanging onto manager Pep Guardiola and key players like Kevin de Bruyne and Raheem Sterling.