Arsenal should have won the Premier League match against Chelsea. All the discussions I have seen on Chelsea vs Arsenal before the match started have put Arsenal ahead but unfortunately Arsenal could not win this match even though they collected a point in this match. Arsenal have a match against Sevilla in the Champions League a few days later, a much needed win against Chelsea before the match against Sevilla in the Champions League. If Arsenal perform the way they did against Chelsea against Sevilla then I'm sure they won't get full points in their Champions League match. Arsenal must be ready for the Champions League match with a few days to go. The manager will also have to focus on how to improve the performance as the match against Sevilla is very important for Arsenal.
I will not link the matches in the domestic league and UCL for the two teams, if you look at the domestic matches of course Arsenal experienced bad results and Sevilla achieved satisfactory results even though both of them drew, Arsenal drew against Chelsea and Sevilla drew against Real Madrid.
However, in the UCL match I think it will be different, Arsenal and Sevilla are the same high school teams that will be very ambitious to win the match but we can only speculate realistically and I cannot deny that Arsenal's quality is currently much better so they do have a greater percentage to be able to win the match.