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.
Chelsea needs to play in the best rotation like when it was getting win streak, graham has been doing some rotation during last few matches which gives bad result in EPL. The problem is player like gabriel, saaka are so difficult to block. Chelsea's defensive player must work even harder to make it happen. I saw that how poor the performance from the defensive player like cucurela during the match against brighton. This may be possible to be even worst than it. The london derby is also become even more interesting.
I can't even sure how chelsea can block all attackers of arsenal since they were very active. There would be need to see azpi and thiago to play together.
I dont know if Graham Potter is taking into consideration the intensity of Arsenals attack. Their front 3 have contributed about 26 goals and created a lot of chances in their team this season. In recent games, Potter has been trying to switch to a 3-4-3 formation playing both Sterling and Pulisic as wingbacks. If he decides to go with this against this Arsenal side, hes going to suffer the defense and theyll end up conceding alot of goals. He needs to fix up a balance team that can absorb the pressure and momentum Arsenal will bring to the Bridge.