UEFA has opened disciplinary proceedings against AC Milan and their goalkeeper Dida following the Brazilian's controversial substitution during last week's Champions League defeat away to Celtic.

Dida was stretchered off the pitch near the end  after a Celtic fan invaded the pitch and appeared to make light contact with the goalkeeper.

In a statement released on UEFA's web site, European soccer's governing body said the case would be discussed by its disciplinary body on Thursday.

UEFA said the proceedings had been instigated based on their disciplinary regulations which state that "players, officials and members, shall conduct themselves according to the principles of loyalty, integrity and sportsmanship.