On several occasions, Xavi said that Barcelona is serious about targeting this competition trophy. even one of their strikers, Lewandowski, once said that he and his colleagues had the ambition to win the Europa League trophy. so it's clear that Xavi really cares about this competition trophy besides prioritizing winning the La Liga trophy.
I can't predict what will happen in the match between Barcelona vs Manchester United. because after all, this fight is a crucial match for both teams. plus, their coaches will compete tactics and strategies.
IMO from my point of view both coaches will focus on the midfield battle. why, because Barcelona have an advantage in their midfield over Manchester United. just relying on Casemiro, that's not enough, Ten Hag needs a tactic to counter the midfielder that Barcelona has.
This fight is a tactical war game. and if Xavi applies his formation like the El Clasico match, by relying on two Pivots and two attacking midfielders plus Dembele and placing Lewandowski as the sole striker. I'm pretty sure Man United will have a hard time facing Barcelona. however, we will find out later after this bout has taken place.
Well, that's mainly because it is the only acceptable result. Think about it this way, if they lost at semi finals of UCL, would anyone say anything about that? It would be fine and they wouldn't really be hated for losing there, but in europa? They need to either win it, or even losing at finals would be a bad situations, no matter what they do, unless they win it all, it will be a bad result for them.
This is why it's clear that they need to keep on improving and being better. United or Arsenal or any other team, no matter who they end up facing, they need to end up winning and that's an important distinction to make. I believe they are capable of winning, but being capable and being able to are different things.