But they can be stopped, and one team that can do it visits the Etihad on Saturday afternoon: Tottenham Hotspur are perhaps the team that plays the best football in the Premier League, but that's only because Manchester City are on a league of their own.
The Germany midfielder's City career has been punctuated by serious knee injuries and he was delighted to have contributed to such a commanding victory.
Pep Guardiola thinks he would not have stood a chance of getting into his Manchester City team because Fernandinho is "much, much better" than he was.
"I think it was a good experience for the team, when you win and play well you maybe don't learn, so you must learn from this type of game", he told BBC Sport.
"We all know that Pep Guardiola is an educator, someone who wants to install confidence and different tactics within players, but can you take that on board?"
"Tottenham is an important game because the opponent is so tough", Guardiola said.
Eriksen's stoppage-time strike, a low effort with his left foot, offered scant consolation. They are a very unsafe team.
But while the former Barcelona and Bayern Munich coach believes they still have levels to climb to, he insists that City can not go through the season unbeaten in the Premier League.
"But no matter what happens on Saturday, nothing is going to change - we are not going to win the Premier League tomorrow, we are not going to lose it either".
"In the last 10 games we won eight games", Chelsea boss Antonio Conte said.
"But I'm not anxious, because in the end it's always three parts in all the situations in football - the players, the club that owns the players, and another club [that might] want some players".
"Only decide the plan, provide the plan to the players and on the day only deliver that plan". "The most important thing is our collective performance and it was not how we expected".
Marko Arnautovic scored against his old club Stoke as West Ham made it seven points from three games without conceding.
"When I dropped points in those games, people said finally they have finished the run and I said you have to talk about what we've done", Guardiola said.