Barcelona could have won in the playoffs later, but the question is. what will Xavi apply, if he still doesn't fix his army. I'm sure Barcelona will find it difficult to meet Manchester United in the playoffs later.
Barcelona's performance is not stable yet. There are many star players in the team. However, Xavi is still struggling to stabilize the team. Barcelona is going to face Manchester United in the first match of the Europa League. Manchester United team is still not stable. Their performance is weaker than Barcelona's. And so I think Barcelona will probably be able to win against Manchester United. However, Xavi's main goal now is the La Liga title. However, Xavi will surely form his best squad in the Europa League matches.