There is precedent for clubs suing clubs guilty if cheating for loss of income, Burnley/Everton.
Should Southampton warm up the Lawyers?
2015-16. Saints took 3 of 6 from City (lost 3-1 at the Etihad, won 4-2 at home). Final table: City 66, United 66, Saints 63. United took the leftover Europa group spot after winning the FA Cup; Saints still went into the Europa League groups.
If Saints had won both, they gain 3 and City lose 3: Saints 66, United 66, City 63. Saints’ goal difference was +18 against United’s +14, so Saints would have been 4th and in the Champions League.
Do we have a claim?