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You are right, Xabi and Luis Enrique are students and teachers. And in this match Xavi will definitely try to prove that he was a worthy student of Luis Enrique

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Luis Enrique is very experienced compared to Xavi this is true. But Xavi cannot be underestimated. Last season he won the La Liga title with Barcelona. The situation in Barcelona was very weak and shaky. He has been able to stabilize this team. So I would say Xavi has the ability to beat a PSG team.
Barcelona's match strategy is quite good. Barcelona players also performed well against Atletico Madrid in the last match. The PSG vs Barcelona match will be very competitive. It is impossible to predict which team will win. Both teams have equal chances of winning.
PSG has many reliable attackers in its squad, that is an advantage that PSG has compared to Barcelona. Meanwhile for Barcelona, this team is being built with good confidence to finish this season with the best results. Xavi will try to convince his squad that PSG can still be beaten regardless of the depth of the squad they have.
This challenge must be accepted inevitably and both coaches will try their best. Luis Enrique has experience in winning titles with Barcelona, but Xavi has also done it as a player. Both coaches will compete as best they can, but I think Barcelona has a slightly lower chance than PSG of qualifying for the semifinals. Whoever can win that match will probably qualify for the final, PSG or Barcelona.