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 are 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.
Sevilla looks really good this season so far and i think they will go really far this season. In the champions league i think they will finally make a step forward and go into the knock out faze. They played maybe against teams on bottom but this is where you make easy points. Sevilla this year looks like top 4 team in the la liga
How mate? I mean how is Sevilla that is yet to win any match this season make it out group stage when other teams have made more than one or two win in their matches. I was impressed with them the last time they held Super cup with Manchester City which they played draw to final and then further proceed to extra time and then lost to Manchester City but since then, they haven't fallen into good shape, and I'm not sure if they are going to beat Atletico Madrid as well that are currently on 4th place on the table.
Performance change and improve actually but will Sevilla improved between now to 20 September to play their fort group match, that's a question that's hard to answer but observing that they will play against Lens that I s having poor performance in their domestic league will b an advantage to secure their first 3 points.