Romelu Lukaku is facing a three-match ban that would rule him out of the Manchester derby after he was caught on camera kicking Brighton defender Gaetan Bong in the groin. Lukaku lashed out at Bong with his right boot, then connected with the Cameroon international with his left as they tangled at a corner moments before Manchester United’s goal at Old Trafford. The 66th-minute incident went unnoticed as Ashley Young’s shot took a big deflection off Lewis Dunk and looped into the net, but it was captured on video and is set to land Lukaku in trouble on Monday. The FA are aware of the incident and will study referee Neil Swarbrick’s report before viewing more footage. United’s £75million striker faces a charge of violent conduct that carries an automatic three-match ban, potentially keeping him out of Tuesday’s game at Watford, Saturday’s trip to Arsenal and the Manchester derby at Old Trafford on December 10.