Yeah a strong star fom City so far in the PL but they also haven't been properly challenged as well. City have game against Arsenal in October and that's the game where there is possible of a break in City's consistent form. Brighton in the next game after Arsenal will also be a tough fixture and possible drop of points for City. So some tough fixtures are getting lined up and busy schedule with CL games too. It would be interesting to see how City handles their games ahead.
His busy schedule in two leagues will make the energy of Manchester City players drained continuously they are most likely in several matches will play all their reserves in EPL to maintain the performance of the Manchester City core players, but against the top team in the EPL, Pep Guardiola will exert the player in essence , that strategy might be done to fight Arsenal, Liverpool, Tottenham and Brentford in subsequent forms.
It's quite interesting indeed, they get Wins Streak in EPL, and it might make a new history, if they cannot be defeated at EPL.