Goals from Sam Edozie, Ben Knight and Riyad Mahrez saw City go in at half-time 3-0 up against Barnsley after a blistering first 45 minutes.
And with Kevin De Bruyne watching on from the stands, Nathan Ake fired in City’s fourth after a clever backheel from Pablo Moreno in the second half.
It was a fine performance from City, with Pep Guardiola blending youth and experience expertly to see off a side who finished fifth in the Championship last term.
City were on the front from the off, with plenty of verve and vitality to our pass-and-move, possession-based football.
Nigerian-eligible Sam Edozie opened the scoring with a tap in at the backpost after wonderful play from Riyad Mahrez down the right, the Algerian playing a pinpoint ball across the six-yard box to present the youngster with a simple finish.
It was Edozie’s second goal in two games after he bagged in Tuesday’s 2-0 win at home to Preston.