Police are investigating an allegation of common assault against Jose Mourinho following a Champions League tie.
It has been alleged the Inter Milan manager punched a supporter as he left Old Trafford stadium after his team's defeat by Manchester United.
Police have contacted United to request CCTV footage of the area and have confirmed a complaint has been made.
A spokesperson for Manchester United confirmed they are aware of the allegation but made no further comment.
A Greater Manchester Police spokesman said: "Just before midnight on Wednesday, 11 March 2009 a man reported he'd been punched in the face outside Old Trafford.
"Police are investigating this common assault allegation. Inquiries are ongoing."
Meanwhile The Times yesterday reported that Mourinho snubbed Ferguson after their 0-0 drawn first leg match in Italy.
But the "Special One" went on to explain that that did not suggest he did not disrespect Ferguson. - Reuters