If Atletico win against Sevilla, they will have a great opportunity to stay at the top-5 of the standings, and the match against Brugge on October 4 should not be a serious problem for Atletico. Although I agree that it could be a draw against Sevilla, because statistically they have a lot of draws. The last time Atletico won away against Sevilla was 4 years ago. I was probably too confident that Atletico would win, but I still think they will. 
it looks like to take 5th place this week will be a little difficult for Atletico Madrid because the teams in their ranking will face weak teams like Villarreal will face Cadiz and Osasuna will face Real Madrid so if Villareal wins then it is a chance for Atletico Madrid to take 5th place quite small even though they won the match against sevilla. Sevilla also cannot be underestimated because they are trying hard to stay away from the degradation zone. Meanwhile, Villarreal is sure to be easy enough to get 3 points in the match against Cadiz because Cadiz performance so far has been very inconsistent.Despite my belief that Atletico Madrid should win this match, I am not so sure due to the recent performance that they have shown lately. It is important to mention that they have recently lost to both Real Madrid and Bayer Leverkusen. Thus, I really doubt that Atletico Madrid will be able to win the game against Sevilla in the end.
On the other hand, Sevilla is in 15th place with only one win under their belt. As a result, I believe that they will not be able to win the game against Atletico Madrid due to this. However, I think the least surprising result is going to be a draw between both of these teams. There is no doubt that Atletico Madrid must win if they are to move ahead of the table.