The match they will play tomorrow is critical because Chelsea is a team that is slowly starting to recover. Arsenal, which gained great morale by beating Manchester City, aims to keep its morale even higher by beating Chelsea. I think Arsenal can no longer be stopped by either Sevilla or Chelsea.
Crucial because Arsenal has very close points to Sevilla in the Champions League group standings so Arsenal will try to win so that their position is not taken over by another team or by Sevilla in the Champions League. Meanwhile, in the Premier League, Arsenal will also try to win as much as possible because the points are the same as the rivals above them, so Arsenal will try to win in order to become the leader of the standings, so these two matches are quite crucial for Arsenal this time.
Arsenal's target to win the group stage but there are some strong clubs like lens and sevilla. I remember when people called that these clubs as weak clubs in this group but they forgot that if lens and sevilla did have great performance last season.
Lens is always having good history against arsenal but im still doubting sevilla at this moment. It's caused by sevilla never got excellent result against arsenal. There are still 4 match days remaining at this moment.
Arsenal can still win the group stage as long as the club is solving the problems against lens.