The two teams are currently preparing for the second leg of their quarter-final tie at Estadi Olímpic Lluís Companys on Tuesday night.
Last week, Barcelona prevailed in a thrilling encounter at Parc des Princes, responding to conceding two goals at the beginning of the second half to win by a 3-2 scoreline.
However, it was not all positive for Xavi and his squad with Andreas Christensen and Sergi Roberto both collecting yellow cards that sees them suspended for the upcoming fixture in Spain.
While Xavi will be solely focused on trying to reach the last four of a competition that is important to Barcelona for both on and off-the-field reasons, he will also be conscious of more availability issues that could arise.
Which Barcelona players are one yellow card away from a suspension?
Five players - all of whom are important to Xavi - will be running the risk of a third caution of the continental campaign.
Perhaps most notably 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 the 90 minutes on each occasion.
Which PSG players are one yellow card away from a suspension?
Coincidentally, PSG are have a quintet of players who are running the same risk as their hosts on Tuesday evening.
Ousmane Dembele - formerly of Barcelona and who netted in the first leg - has already collected four yellow cards and served one ban in the 2023-24 Champions League.
Milan Skriniar, Lucas Hernandez, Manuel Ugarte and Vitinha are the other four players who will have to tread carefully in defence and midfield.
Of the 10 players that have been mentioned, only six started the first leg, with Torres and Felix being used as second-half substitutes for Barcelona.
Skriniar and Ugarte did not make it onto the pitch for PSG.