Indeed, if you look at their history in the previous season, Sevilla experienced a very deep decline. Last season they could have finished fourth. Today they are in fourteenth position which leaves only twelve games.
Sevilla will fly to Old Trafford in the first leg of the European league, obviously they will not be counted as favorites considering they will be a visiting team and their opponent, namely Man United, is one of the favorites to win, if Sevilla still wants to stay in the European league by being able to semifinals then they should be able to play well in the first leg to make the result draw or if they lose not by many goals and that will still open up their opportunities in the second leg, but it looks like Man United will take this opportunity as an advantage to make lots of goals and play more safe when they have to go to Seville's home.