Bolton striker Kevin Davies has been ruled out for up to six weeks with a depressed fracture of the cheekbone.
The 29-year-old sustained the injury when he was elbowed in the face by Charlton's Hermann Hreidarsson in Saturday's Premiership defeat at The Valley.
Hreidarsson was sent off for the offence but Davies was later shown the red card himself following a separate incident involving Amdy Faye.
Davies had a scan today and will now have an operation tomorrow to determine the full extent of the injury.
Bolton manager Sam Allardyce told the club's official website: 'It is terrible news for Kevin and the squad.
'I feel for Kevin. He is the ultimate professional who always gives his best no matter what strain he is under from opposition defenders.'
Allardyce believes Davies came in from some rough treatment in the game and feels he was dealt with harshly by referee Mike Dean over his sending-off. He confirmed Bolton would be appealing against the dismissal.
He added: 'It is appalling that Kevin doesn't get the protection he deserves from referees.
'He is constantly put under duress by defenders and he never feigns injury or tries to con the referee by simulating.
'Even though Kevin will be out of action for six weeks, we feel it is right to appeal against his dismissal. There was nothing in the incident and he was unjustly sent from the field.'