Arsenal striker Eduardo could face a two-match Champions League ban if UEFA decide to charge him with diving.
UEFA disciplinary officials are reviewing the incident when the Croatia striker won a penalty against Celtic on Wednesday night before deciding whether he will be charged.
A UEFA spokesman said: "We are reviewing the match to see whether a disciplinary investigation should be launched."
Under UEFA rules, if charged and found guilty Eduardo could face sanctions up to a two-match ban in European competition.
Scottish Football Association chief executive Gordon Smith has called for Eduardo to face action and UEFA president Michel Platini confirmed he could be suspended.
Platini, speaking in Monaco, said: "There are disciplinary procedures at UEFA and the procedure could be taken to suspend the player.
"Scotland often start such procedures, last time it was a Lithuania player who was sanctioned."
Platini said his plan of having two additional assistant referees, one behind each goal-line, would cut down on diving. The scheme is being trialled in this season's Europa League.
He added: "One day players will give up simulating because referees will see them. For years players have cheated because the referees were not of a good enough quality.
"I am convinced if you have referees close by that will prevent players from simulating and players will take the right decision. I have always said better to have more referees than a multiplication of disciplinary procedures."
SFA chief Smith wants UEFA to act retrospectively to punish Eduardo in the same way they dealt with Lithuania striker Saulius Mikoliunas, who cheated to earn a spot-kick against Scotland at Hampden Park in September 2007.
Video evidence was used to sanction Mikoliunas, who was banned for two matches. Smith said: "Eduardo is a terrific player who has battled back from a serious injury to resume playing at the highest level.
"However, last night he showed disrespect to the game by his actions in winning a penalty against Celtic.
Celtic midfielder Massimo Donati also called for Eduardo to be banned. "If it is clear on TV then UEFA must act against Eduardo and ban him," said Donati. "I think he should get a two-match ban because it wasn't a penalty. I told him that and everyone in the Celtic team told him that."
Wednesday night's game was still 0-0 at the time, though Arsenal held a 2-0 advantage from the first leg. Gunners boss Arsene Wenger acknowledged Celtic goalkeeper Artur Boruc did not bring down Eduardo in the penalty incident but claimed his forward was taking evasive action.
