Arsenal look much better than Chelsea in all aspects. Hope for Chelsea is justified only by the fact that it is once a strong team, which is about to interrupt a series of their terrible performances and everything will start again, they will start winning and everything will be fine, but I think this is far from true, so I think it is not worth to put high hopes on Chelsea
After seeing Chelsea's good performance in their last 3 matches, it becomes difficult for me to take sides in this game, Though I'm a full supporter of Chelsea, I doubt that Chelsea will win their game against Arsenal. To me, it is not enough reason to bank on Chelsea based on their previous three straight victories after seeing how they have been struggling since the beginning of this season. But I wouldn't be surprised if Chelsea defeated Arsenal.
the best I can do is a draw. I think that Chelsea have not recovered and three wins so far do not mean anything, especially they were matches against average teams, and they now have a match against Arsenal, who have not lost a single match yet this season