Last Updated: Wed, 06 Mar 2013 17:23
UEFA has opened disciplinary proceedings against United over Nani's red card and the non-fulfilment of post-match media obligations.
Manager Sir Alex Ferguson reacted angrily after Nani was sent off for a high challenge on Real Madrid's Alvaro Arbeloa in the 56th minute of the match, which United were leading 1-0 at the time.
But with the man advantage, Madrid came back to win 2-1 on the night, 3-2 on aggregate.
Ferguson did not appear for interviews after the match, with his assistant Mike Phelan attending the post-match press conference and saying the manager was too "distraught" to speak, while the players did not stop to talk in the mixed zone.
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