Since they lost the Super Cup to Manchester City they've failed to get a win in their last two matches that's a very bad way to start a season, when they lost against Alaves i felt maybe it's the beginning of the season and they were yet to recover from the Super Cup loss but losing against Girona that's one thing i don't understand, they were more possessive and had a better chance of winning but they failed to convert 21 shots having just 4 of it on target.
It would be very tough for Sevilla to win against Athletico Madrid because Sevilla is currently the weaker side between both and they won't stand a chancd because Athletico got a better Attack and defense line compared to that of Sevilla, but i won't predict a straight win for Athletico i think it would be a draw so I'll predict a 1x in favour of Atletico Madrid.
The defeat to Manchester City was a bit more natural because their strength was below the quality of players owned by Pep Guardiola, I even saw Sevilla having high playing intensity so they were able to hold Manchester City to a draw until the game was over. Even though it was through a penalty shoot-out, Sevilla had to concede Manchester City's victory. Seville should have performed much better against Deportivo Alaves and Girona because they had slightly even strengths, but instead Sevilla failed to take advantage of the opportunity to gain full points.
The third match will be against Atletico Madrid and this will be a match that will not be easy for Sevilla because Alletico Madrid is also aiming to win in that match. My prediction is that Sevilla will face a fierce resistance because the match will take place at home to Atletico Madrid and if they don't get any points in this match it will make them sink even further to the bottom of the standings.