Manchester City are set to go head-to-head with UEFA on Monday in the Swiss courts as they desperately battle against a decision that could see them banned from the Champions League for two years.
Animosity has been bubbling between the Premier League giants and European football's governing body for almost a decade now, and the latest clash has further strained the relationship.
Fans of City have made a habit of booing UEFA's anthem when it is played ahead of Champions League games, something that has intensified since 2014, when the club fell foul of Financial Fair Play.