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.
It is very true that Manchester City has not been in their best of form recently and it is making it really difficult to place them in a position to fit in to the title race but even with that I do not want to believe they are actually not fit for the title race because they have a good squad and an informed coach only that they need to work on their mentality for the season of which if they do, they may have more chances than Arsenal except for Liverpool, I doubt if Chelsea will be able to stand in as a threat to them literally.
Manchester City may not be in good form this season following the issues they have been having in the team since last season but that doesn't make you should exclude them from the title race this season it's not possible knowing that last season they suffered the same set back but few matches before the end of the league they rose up just to make sure they made it to top4. The have a very good squad but they are not very organized still but do not be surprised if you see them starting very slow but finishing the season ahead of the teams that we think are the favourite in the league now.