The PGMOL refereeing body has accepted Liverpool midfielder Fabinho should have been sent off for a tackle on Brighton striker Evan Ferguson in Sunday’s FA Cup tie.
The decision was not overturned by VAR, even though it was the type of challenge PGMOL would expect to result in a red card.
Brighton won the match 2-1.
As part of a campaign for transparency within PGMOL, the organization privately said there was enough evidence to warrant a red card.
It is pointed out that although the challenge was of relatively low intensity, there was full contact point of the studs above the ankle from behind.
This should have prompted an intervention from officials reviewing the match at Stockley Park, in the hope that referee David Coote would have been sent to the TV screen and advised to update his decision.
Ferguson had to be helped from the field after the tackle and then left the Amex Stadium on crutches.
Brighton have yet to specify the extent of the damage.