Marouane Fellaini is facing a minimum three-game ban for headbutting Stoke defender Ryan Shawcross during Everton's 1-1 Premier League draw on Saturday.
Fellaini was involved in three separate incidents at the Britannia Stadium, which went unseen by referee Mark Halsey. As a result, the Belgian midfielder could be sidelined for as many as nine games when they are reviewed by an FA panel on Monday.
Fellaini was seen headbutting England international Shawcross, as well as appearing to elbow him in the face. He also appeared to lash out with his fist during a separate incident.
The original butt is likely to earn a three-match ban on its own, and if Halsey admits to not seeing the other offences they could also be taken into account, landing the Everton player a significant suspension.
And Fellaini is also likely to be fined two weeks' wages, around £150,000, by manager David Moyes who was unhappy with his player's behaviour.
"We will take the punishment if it is given for it,'' Moyes said. "I have told him in the dressing room that it is not acceptable - I won't accept it as a manager that he does that.''
Fellaini later apologised for his actions, adding: "I apologise completely to Ryan Shawcross, my team-mates and to our fans at the game."
Everton are fifth, two points behind Tottenham in fourth. Fellaini is likely to miss league games against West Ham, Wigan and Chelsea.