Even though Arsenal's match was quite good last week, it will not necessarily be easy against Sevilla later. Even though Sevilla in the local or last match did not show their best players, of course Sevilla will not remain silent in the next match. Playing with full support from the audience will definitely be an encouragement for the team, or as additional ammunition (stamina), yes of course Sevilla will have a surprising impact in the match because Sevilla will reduce the point score in the standings.
Sevilla did something quite good in Laliga because they managed to hold Real Madrid to a draw in last Saturday's match, well no one thought they would be able to do it because they saw how the two teams were in quite different conditions.
With these results and also how Arsenal could only get a draw against Chelsea in the English Premier League, this will make the third match in the Champions League interesting and difficult to predict because Sevilla could beat Arsenal even though they are not favorites to win even though this is a home game for Sevilla. I'm pretty sure Sevilla will be able to surprise them by getting points in this match because they really need this because defeat will only further close their chances of qualifying for the knockout phase.