On this evidence, City could follow in their arch rivals' footsteps at the end of the season.
Manchester City's deal with Puma would see the brand replace American sportswear giant Nike, which the Daily Mail says now pays the club just UK£20 million annually. But that was the only sour note for City.
The victory brought a first trophy of the season for City, but Guardiola was reluctant to look ahead to defending the Premier League title. The Citizens did the double over Chelsea last season but Chelsea haven't lost three in-a-row to City since 2010 and they might just stop the rot again here.
Sarri and Guardiola are close friends and dined together on the eve of the Community Shield, yet this first experience of Chelsea's reduced status must have left a nasty taste for the Italian.
Whatever their fitness issues, City looked slick in the sweltering London sunshine as they ran Chelsea ragged. During his time at Napoli, Sarri fielded a midfield three of Allan, Jorginho and Marek Hamsik.
58' - GOAL! Chelsea 0-2 City.
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But Jorginho made an underwhelming start, repeatedly giving the ball away in unsafe areas.
Aguero was among them and took just 13 minutes to net his 200th goal for the club after collecting a pass from 18-year-old Phil Foden.
While Sarri is required to talk up their hopes of getting their season off to a flier, this 59-year-old tactician may well be offering these comments for public consumption in a bid to disguise a less palatable reality.
Guardiola has been impressed with the shape City's all-time record scorer returned to the club in after the World Cup and believes the Argentinian can hit the ground running when City begin their title defence.
In between there was a rare miss, with Aguero hitting the side-netting after rounding Chelsea keeper Willy Caballero, but make no mistake, City's goal machine is looking sharp and the golden boot will surely be in his sights.
Callum Hudson-Odoi - 6.5 - Timid to start but grew into the game. But, the Englishman is likely to start on the bench against Manchester City.
His strength and agility were on show, too, as he wormed his way through a swarm of dark blue shirts to create the first goal, whilst his well-timed lofted pass sent Aguero through early in the second half, before Caballero saved a shot of his own a minute later. The Italian worldwide will look to dictate the play from the middle of the park, with Ross Barkley and Tiemoue Bakayoko giving him company in the midfield trio, with Cesc Fabregas likely to miss out due to a knee injury.