It won't be too difficult for Arsenal to secure a victory against Sevilla, even though they're playing away from home. Arsenal's fate is still in their own hands.
Well Arsenal are in a better condition to win the game based on their performances in the this season however they lost their last UCL game against Lens therefore I don't think they'll be ready to concede another defeat against Sevilla, judging from both teams performance currently it's very obvious that Sevilla are the weaker side even though they'll be playing with a home advantage, they're currently 14th in the Laliga standings why Arsenal are 2nd place in the EPL and recently won the champions league holders Manchester City.
Well Sevilla is not a team to be underestimated cause they're not very good at attacking but they've can be very good defensively on a good dsy and their defense can cause alot of problems for Arsenal's front 3, Arteta should just hope another player from their front 3 doesn't sustain an injury in that match.