A Football Association disciplinary commission found that Carlos Tevez should have been sent off for his part in the clash with Joey Barton on the final day of the Premier League season.
Queens Park Rangers captain Barton has been handed a 12-match ban for his part in a mass scuffle which included confrontations with Manchester City's Tevez, Sergio Aguero and Vincent Kompany.
The unsavoury incident was sparked by an off-the-ball collision with Tevez, for which Barton remonstrated to referee Mike Dean that the Argentine should also have been sent off.
But Tevez escaped a red card and has also avoided any retrospective punishment, despite the FA concluding with the use of video evidence that the striker should have been dismissed.
The commission's report, printed in The Times, read: "Mr Dean was questioned (by the commission) about the 'Tevez incident' for which Barton was dismissed.
"It was confirmed that neither the referee nor the assistant saw the alleged incident of Mr Tevez striking Mr Barton, although Mr Barton immediately made representations to Mr Dean.
"That is what happened and such comments by Mr Barton can be clearly seen in the video.
"The commission accept that Mr Barton was aggrieved by the action of Mr Tevez and Mr Dean confirmed that had the incident been seen by the officials as shown by the clip supplied by Mr Barton, it would have been an automatic red card.
The commission find that this does not, however, excuse the subsequent action by Mr Barton in relations to Messers Kompany and Aguero."