Liverpool have faced Sevilla in the Europa final once before. That was the early stage of Klopp at Liverpool. Sevilla prevailed on that occasion. I know that Liverpool team and this one are in no way the same but it's worth pointing out.
Sevilla got a lot to work on if they really want to go that far in Europe next season. Even in the league. I know they're not comfortable with being around the middle part of the table. They need to make a couple of additions to their squad and they might be ready. The problem they will face is n the strict financial policies of La Liga.
Liverpool on the other hand are not going to have those kind of problems. We've already started noticing their presence in the transfer market.
Anyway, it's still too early to predict who will get to the finals next season. Let the season begin first.