Dean Huijsen, Alvaro Carreras, and Aurelien Tchouameni all face potential bans if cautioned in tonight's first leg. The trio, who are expected to start, would miss the return leg at Santiago Bernabeu next week if they receive yellow cards.
The disciplinary concerns add pressure to Real Madrid's crucial UEFA Champions League knockout playoff round match at Estadio da Luz, where they aim to overturn their previous 4-2 defeat to Benfica.