As good as Arsenal are, I don't think they will ever underestimate the opponents they will face. Even though Chelsea has a less consistent performance but they will play at home and I think that will be an advantage for Chelsea. In spite of this, Arsenal will remain the favorite because they have a more promising performance than Chelsea, but I don't think it will be so easy for Arsenal to beat Chelsea just like that.
If Chelsea faces a big club, maybe their performance will not be so bad and they will be able to provide resistance. Because this will be a prestigious match for both teams. Playing at home is Chelsea advantage so there is no reason not to take advantage of this moment. For Arsenal, they are ready to play at home and will not put pressure on Arteta squad. The mentality of Arsenal players who continue to improve and develop after beating Manchester City is certainly a motivation to continue to maintain their victory.
Indeed, sometimes in big matches like this Chelsea can play completely and they certainly don't want Arsenal to win easily at home. In history, these two teams have always had heated matches, but now we can see that the performance of the two teams is quite different. At least Chelsea must try everything to stop Arsenal and if they succeed, of course this will be more motivation for Chelsea to improve their performance so far.
Arsenal also won't be silent, however, they don't want Spurs or Manchester City to be so free next week and they have to win if they want to maintain stability in the standings. Mikel Arteta has his best squad for this season and their readiness to challenge for the EPL title again is also increasingly mature.