~Snip
Chelsea and Manchester City match are the hardest one and the most difficult to predict in my opinion. Odds are slightly better for Manchester City because they are playing home in Etihad Stadium and because of the positive previous results but Chelsea was weaker back then.
The other game that you mentioned should end with gunners victory even if they are playing away.
Even if Manchester City lost 4-2 to PSG in the Champions League, but Manchester City is the favorite to win its home game against Chelsea. Manchester City have had good form in the Premier League in recent games and that will benefit them, but a poor performance in the Champions League will likely have a negative impact on the team's morale when they meet Chelsea this week.
I suspect the match will end in a draw even though City has a high probability of winning. But if you look at probability, Manchester City's win is more likely to be expected rather than losing or drawing. Chelsea and City will try their best to win 3 points, but it's true, the result of this match is very difficult to predict.