There are other teams that will give some Man City tough time this season for instance the winning goal scored by Coutinho when Aston Villa played Man City was ruled out as an offside whereas replays shows it was onside unfortunately that match ended 1-1, Man City came from behind to drew their match 3-3 against Newcastle, thus there are tougher competitors in EPL now invariably increasing their rivalry to more than the two clubs mentioned, playing draws also reduces points, I believed it even becomes tougher in defending the EPL title because all their opponents will play with all their might to earn a good result.
Every team could end up with a draw, even City would, the success doesn't come from a few games, it comes from not losing too many points all season, and City usually finds a way to win games one way or another, meaning they could still be at the top when the season ends.
In order for them to get lose, other teams getting better isn't enough, they have to get worse as well which would happen if they start to lose some players, either from retirement, old age, or injury but somehow end up losing good players. Right now they got even better compared to last year, and they were already amazing last year, so I am not really seeing how they could fail to win the title.