Chelsea are a strong team. The big defeat against Brighton cannot be a factor in itself. Ultimately, Arsenal lost to Manchester United in the league and no one expected it. Maybe something similar can happen in the match against Chelsea. Chelsea is a team that can beat them. Even though Arsenal seem to be the favourites, I think both teams can win.
the data shows both teams have a history that is almost balanced so we can't also say that chelsea will win easily against arsenal
if the potter doesn't use a good strategy then arsenal will win easily against chelsea even though the match will be played at Stamford bridge