Sevilla have serious problem in La Liga at the opposite of UEFA competitions matches. They obliged Manchester City to play penalties then lose vs Alaves and Girona which is quite random.
Yes, I agree with you that Sevilla's performance has become weak nowadays, but seriously, I did not discover that against Manchester City because they really performed well, but just because Manchester City have better players than them. In fact, I don't expect Sevilla to perform at that level. But in this domestic league, I see their poor performances, which I never expected from them. Their coach really needs to do something to fix this problem in time; if not, Sevilla may end up in a position they never expected at the end of the season.
Their next match will be played away vs Atlético Madrid which isn't good in my opinion. ATM just punished Rayo Vallecano with 7 goals to 0! Their next games will be mild until they face Barcelona in October.
I can't say much, but I don't think Sevilla can do anything to win against Atletico Madrid currently, especially at home. I am expecting Atletico to come out with three points against Sevilla in their next match with their current form. Defeating Rayo Vallencano with 7-0 is what I never expected from them because I see Rayo Vallencano as an average team that always gives big teams in La Liga competition a problem, especially in their home games.