Ìlkay Gundogan open the scoring for City in the 19th minute of their Saturday afternoon clash, courtesy of a quality assist from new signing, Erling Haaland off a beautiful holdup play.
Following a Bournemouth corner on the opposite end of the field, a counter was kick-started by City after Haaland cleared from the box with a header.
Phil Foden found De Bruyne who cut in front the wing and from the edge of the box, sliced a shot with the outside of his boot into the left bottom corner 31st minute.
Bournemouth had a 2 minute spell of attack around the 34th minute but a mix up between Cristie and Jack Stacey led to a loss of the ball which Man City capitalized on to start another counter attack.
At the end of that attack, De Bruyne turned provider as his pass into the box from the edge of the penalty box on the left met Phil Foden who finished into the right bottom corner.
Bournemouth’s Christie was lucky to still be on the field as his stamp of Gundogan in the 40th minute, but, somehow, escaped any punishment.
The first half ended 3-0 in favour of the hosts, Manchester City.
The away Goalkeeper, Travers, saved a De Bruyne effort in the 54th minute to avoid further anguish.
Early first-half substitute, Jack Grealish almost damaged his ligament off a tackle in the 70th minute, but recovered well and continued the game.
Three minutes later, he squared played a ball from inside the box to Haaland who only managed to scoff his strike wide.
Grealish continued to impress as his lob into the box in the 79th minute was met by Cancelo, who twisted and turned before whipping in a low cross that was turned in for an own goal by Bournemouth’s Jefferson Lemar.
Frustration started to show as Stacey for Bournemouth lashed out at Grealish’s face after the winger beat him with a dribble.
Pep Guardiola made his feelings known at full-time in a tense heat up.
Belgian, Kevin De Bruyne was handed the Man of the Match Award for his excellent display as Man City ran out 4-0 winners at the end of the day.