After Mohamed Salah had hit the post, a penalty from Kevin De Bruyne and goals by Raheem Sterling and Phil Foden took the hosts into a commanding half-time lead.
Sterling then added a fourth following a swift counter-attack midway through the second period as the Reds fell to a loss in their first game as Premier League champions.
On how much the defeat hurts after winning the title last week…
It has nothing to do with last week, to be honest. It hurts like defeats hurt. What I wanted to see tonight was a team who is ready to fight against Man City, who obviously had, I’m not sure if it’s the right saying, a point to prove or whatever. They had easy motivation for Pep, let me say it like this and then the decisive moments, City used and we didn’t and that doesn’t help. So we had probably more chances than we had in games which we won, but we didn’t use them, or none of them, so City were there. Usually we don’t give them that many counter-attacks – with two goals they had a throw-in which is a strength of us usually, but tonight it wasn’t and that’s how it was then and they have this result.