Sevilla team is performing very well. Sergio Ramos, one of the best defenders ever, has been added to the team By doing this, the party will become stronger than before. Hope the team will try their best to do well this season.
Well, Sevilla have started this season just as bad as they did last season, i don't know where you got the impression that they are performing very well, they have played three games in La Liga this season and they have lost all three of them and they sit rooted in the bottom of the table.
Having said that, it is going to be somewhat difficult for Sevilla to make it out of Groub B in the CL, but their fans might not mind if they crash out and into the Europa league, because they have a knack of winning that competition.