Five Barcelona players are running the risk of a third caution in the Champions League and could be suspended should the Catalans make the last four.
Perhaps most notable is Lamine Yamal, the 16-year-old already making 42 appearances for Barcelona this season and emerging as one of the top prospects in world football.
Ronald Araujo, Frenkie de Jong, Ferran Torres and Joao Felix are also in the same situation as the teenager, the latter two having contributed six goals and two assists between them in this season's Champions League.
De Jong has made four starts in the competition, with Araujo the most-used player of the five with seven starts, completing 90 minutes on each occasion.
Andreas Christensen and Sergi Roberto are suspended for the upcoming fixture against PSG in Spain.
The Catalans will face either Atletico Madrid or Borussia Dortmund should they make it through.
