Villarreal players Nilmar and Santi Cazorla could be suspended for the first leg of the Europa League semi-final against FC Porto for deliberately picking up yellow cards in the previous round.
UEFA has confirmed that its disciplinary committee will hear their cases on Wednesday.
The Brazil forward and Spain midfielder received yellow cards near the end of Villarreal’s comfortable 5-1 victory over FC Twente in the first leg of the quarter-finals.
Both players served bans during the return leg, which Villarreal won 3-1.
UEFA will also decide if Barcelona midfielder Andres Iniesta will miss the first leg of the Champions League semifinal against Real Madrid on April 27 for the same offence.