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.
Arsenal quite well defense with 11 goals conceded in Primer League and become team with little goals conceded trough Manchester City and Newcastle have 10 goals conceded, Chelsea have poor performance last match beaten by Brighton Albion with unbelievable scored 4-1. I think excited this match with Aubameyang after sacking by Arteta and he return to primer league with Chelsea. 12 games and Chelsea under era Graham Potter still inconsistent performance, Chelsea in bad perform with unsatisfactory last three match at Primer League draw with Brentford, Manchester United and beaten by Brighton Albion last week. Little great achievement at champion league could give more confidence for Chelsea to win in London match derby.