Hull boss Steve Bruce has accused the Football Association of trying George Boyd by "kangaroo court" after his appeal against a ban was turned down.
The winger was handed a three-game suspension for spitting at Joe Hart during the 2-0 loss to Manchester City.
Bruce now wants the disciplinary system overhauled after Boyd, 28, had little time to respond to Tuesday's charge.
"It's like a kangaroo court - we don't know who sits on it or who is accountable for it," said Bruce.
Boyd has always maintained his innocence of any misconduct after the incident in the defeat at the KC Stadium on 15 March.
Now Bruce believes that litigation could follow as he prepares for Saturday's home game against West Brom without the former Peterborough player.
"The problem is we can't go down and see anyone, we can't be represented on this commission and we don't know who sat on it," added the Tigers boss.
"What we got was three referees on Monday morning saying that in their view he [Boyd] deliberately spat at him [Hart]. We're totally disappointed and the whole system needs looking at.
"For me we didn't get a fair hearing because George Boyd would never spit at anybody, but that's what he has been found guilty of.
"George feels so strongly about it that if there was legal action he could take he would, because they are accusing him of something that isn't in his make-up."
Bruce's former Manchester United team-mate Mark Hughes, who is manager at Stoke, recently called for similar changes to the way the FA takes disciplinary action in the wake of midfielder Charlie Adam's suspension for an incident involving Olivier Giroud.
"I think the process is fundamentally flawed," said Hughes. "If the game was reviewed by video by the people who were there after the game you could accept any decision.
"It was trial by media as by the time the decision was made on the Wednesday the agenda was already set."