is sweating over a possible three-match ban following an incident during Manchester United's 1-0 win over Brighton.
The Belgian striker appeared to twice aim a kick at Seagulls defender Gaetan Bong in the second half of Saturday's match at Old Trafford.
It was missed by referee Neil Swarbrick, but the Football Association are set to review video footage and could take retrospective action.
Should Lukaku be found guilty of violent conduct, he will be banned for United's next three games.
Lukaku had endured another frustrating afternoon on Saturday as he failed to find the net.