Manchester United and Manchester City have spent years battling for control of English football, with the rivalry extending well beyond the streets of Manchester.

Sir Alex Ferguson’s era saw United establish a domestic dynasty, but City’s rise after Sheikh Mansour’s 2008 takeover fundamentally changed the balance of power.

The blue half of Manchester went from occasional challengers to regular title contenders, backed by substantial investment in players, facilities and infrastructure.

United, meanwhile, have had to navigate changing managers and mounting financial pressure while trying to reclaim their place at the top.

The two clubs’ contrasting financial approaches have become an increasingly prominent talking point as football authorities look more closely at how teams fund their success.

Now, the outcome of a major Premier League investigation could have implications far beyond the Manchester derby.

Manchester City set to be relegated

Manchester City are facing a potentially enormous points deduction that could send them into the Championship and keep them there for two seasons, according to a report by the Daily Mail.

However, the suggested punishment remains speculation rather than a confirmed sanction.

The Premier League’s independent commission published its findings last month after examining allegations relating to City’s financial reporting and conduct between the 2009/10 and 2017/18 seasons.

It found the club guilty of serious financial-rule breaches, including the use of commercial agreements that misrepresented the true arrangements with some partners and overstated revenue.

The commission also upheld most of the charges relating to City’s failure to cooperate with the investigation.

City have consistently denied wrongdoing and appealed against the findings.

The Premier League confirmed earlier this month that the club had lodged an appeal, with the proceedings to remain private until the outcome can be published.

No final punishment has been announced.

According to the Daily Mail report, league officials are keen to resolve the matter, with a substantial points deduction reportedly among the possible outcomes.

The report also suggests that a further deduction could follow, potentially leaving City in the second tier for another season.

Expulsion from the Premier League is described as unlikely because of the disruption it could cause throughout the English Football League.

The question for United supporters is whether the findings could alter the historical record of a period in which City became one of Europe’s dominant teams.

City won three Premier League titles between 2009/10 and 2017/18, alongside the FA Cup and three League Cups.

United were among the teams competing with them during those seasons, including finishing as runners-up in the dramatic 2011/12 season, when City claimed the title on goal difference.

However, it would be misleading to claim that United have definitively lost a specific number of trophies because of the alleged financial breaches.

Any retrospective changes to titles would depend on decisions by the relevant authorities, and no such changes have been announced.

There is, though, a measurable financial question.

BBC Sport’s analysis of the potential impact on other clubs estimated that teams across the Premier League could collectively have missed out on £844 million in domestic prize money, relegation-related income and European earnings during the period examined.

The analysis stressed that it could not prove that any individual club would definitely have achieved a different league position or qualified for a different competition.

For United specifically, BBC Sport estimated a £4.8 million difference between City’s Champions League earnings and United’s Europa League prize money in 2015/16.

That season, City reached the Champions League semi-finals the following campaign, while United won the Europa League in 2016/17.

Any punishment would not automatically restore past titles or deliver compensation.

The club’s own financial challenges remain separate, with debt and transfer commitments continuing to shape its spending decisions.

Nevertheless, the case has raised questions about competitive fairness and whether football’s financial regulations have been enforced consistently.