Manchester City's legal fight with the Premier League has the potential to "spiral out of control", a former top club executive has warned.

Christian Purslow, a former Liverpool managing director and Aston Villa chief executive, who also held a senior role at Chelsea, said the case could begin a chain of events that would be "appalling for the game".

City have been found guilty of the vast majority of 115 charges brought forward by the Premier League.

The club were accused of a wide range of rule breaches which centred around claims that they inflated sponsorship revenue from connected companies and made other "off the books" payments to circumvent football's financial rules.

Premier League clubs are seeking legal advice about compensation relating to the charges, while BBC Sport has been told that City will appeal.

Sanctions on the club are yet to be announced, but repercussions could include a points deduction, expulsion from the Premier League or a huge fine.

Speaking on Radio 4's Today programme, Purslow appeared alongside football law expert Paul Gilroy KC, who described the case as a "seismic moment for world football".

Purslow said: "It's a sort of 'where does this end?' because if you look at every single season - the nine seasons which we now know Manchester City breached rules - then all of their 19 Premier League rivals in that season, to differing extents, suffered easy-to-compute loss. Whether it was a place in the Premier League - every place was worth £3m.