Yeah actually it seems you really no Chelsea very well, because just like you said Chelsea performance could sometimes be unexpected because when you feel they will perform well, the next minute they start losing matches to small clubs they are supposed to win.

But however there match against Arsenal will be very tough but the Arsenal team has more upper chances of wining Chelsea because they have all it takes to win the match and if Bukayo Saka was able to come back from the injury it will be an added advantage of the Arsenal team.

However Chelsea performance has been very poor since last season but although I'm not disputing the fact that Chelsea is a very strong team but considering there performance this season I don't think they stand a chance against Arsenal team that has been impressively doing well but however we cannot predict what may happen because in times of soccer anything is possible so let's see what the outcome will be.