I'd think Arsenal would struggle against Chelsea, but should be able to beat Man U and West Ham without too much trouble.
Arsenal will struggle definitely against Chelsea for two reasons;
-Most players ( Gabriel Martinelli, Martin Odegaard, Granit Xhaka, Kieran Tierney, Thomas Partey, Ben White, Bukayo Saka and Emile Smith Rowe) are on international duty at the moment, they will quickly have to adjust to the playing style of their country, to be able to do well for country as a team, after the break which is two weeks, when they have returned, the chemistry players had and the momentum the club had before the break may die down, we may struggle again to get our swagger back.
-Secondly, for the obvious reason that Chelsea is still a very strong and focused club to play against regardless of the problems the management is facing, arsenal may play well like we did against Liverpool but still not win.
Of all things, i hope none of our players sustain an injury during the international duty, that will be a disaster at the point in the competition.
The most decisive factor in the game between Arsenal and Chelsea will be the mentality of the teams, the team with stronger will and winning mentality will easily get the 3 points. We all know Arsenal have been on a fine form before the international break hits but they are also known for not been strong mentally against big sides. Just like coach Arteta, some fans are already complaining about their tight fixtures and from the look of things, this might creep into the heads of the players thus affecting their run in the EPL.