Liverpool are certainly a tough team, the only one with full points.
Chelsea also have a good chance in my opinion.
Arsenal have potential but are unlucky and easily discouraged in my opinion.
I honestly see Manchester City out of the title race.
Liverpool have spent a lot of money on their squad this season. They are undoubtedly the strongest squad in the Premier League. And in all three matches we have seen better gameplay than Liverpool.
Arsenal have faced strong teams like Manchester City and Liverpool in two of their three matches. Although they won against United, they lost 1-0 to Liverpool. Whatever, Arsenal are not a weak team. They will continue to compete for the title.
Chelsea's performance so far can be considered stable. There is no doubt that this team will also compete for the title. Anyway, we do not expect a better performance than Manchester City this season. It is very difficult for City to perform well consistently.