Both Roma and Manchester United have been fined after crowd trouble marred the Champions League quarter-final at the Stadio Olimpico on April 4.
Riot police clashed with the visiting English supporters just before half-time in the first leg encounter in the Italian capital.
Today the UEFA Control and Disciplinary Body confirmed the results of its enquiry, giving Roma a £31,000 fine and Manchester United a £14,500 penalty. Both sides have three days to lodge an appeal.
The incident began when both sets of fans were throwing objects over the barricades, but deteriorated when riot police intervened to keep the Manchester supporters away from the Perspex dividing wall.
The Premiership side bitterly criticised the Italian police for its handling of the situation, but the local authorities insisted their officers had acted "brilliantly" in the circumstances.