Atletico Madrid manager, Diego Simeone, is facing a touchline ban if they qualify for the Europa League final, after he was sent off against Arsenal on Thursday.
Simeone was dismissed for protesting Sime Vrsaljko’s red card after only 10 minutes.
UEFA said the Argentine faces separate charges of insulting a match official and “improper conduct” that could carry a two-match ban.
However, UEFA’s disciplinary panel will not judge the case until next Friday after the semi-final second leg in Madrid.
Atleti themselves will answer charges for improper conduct of the coach and throwing of objects.
Arsenal were charged for the setting off of fireworks, with the case also to be dealt with by the UEFA Control, Ethics and Disciplinary Body on May 4.