The new coach was always doing new rotation in any match. The players needs time to adapt with it. Arsenal was using the perfect combination. Chelsea will be so difficult to face arsenal even when it will be played at home. i don't wanna underestimate chelsea but the fact that if chelsea is so difficult when it will be facing the EPL team. Arsenal can be considered as a team that is still on fire like manchester city.
For now, Arsenal is quite tough in terms of playing and also defense. Chelsea obviously has a pretty heavy burden here. Graham Potter had to rotate his players in order to block the movement of the young attackers who often made the defense difficult. I'm not sure about Chelsea this time either, but if Graham Potter can shut down Martinelli, Saka, or Jesus maybe they will have a good chance. This depends on how well Graham Potter can read Arteta strategy.