While Guardiola admitted he was happy with the start to the new season, which also saw his side claim their first piece of silverware with a win over Chelsea in the Community Shield last weekend, he still feels there is room for improvement. Arsenal must watch long balls over the top, however - Aguero has punished them in that manner in the past, particularly in this year's Carabao Cup final.
City started brightly and deservedly went ahead when Sterling brilliantly skipped past two Arsenal challenges on the edge of the box before unleashing a right-footed effort from 20 yards that flew past Cech. To understand that needs time.
Was solid in defence and found himself in good positions when Arsenal attacked to keep City's clean sheet. With Sead Kolasinac's knee injury keeping him out of action for the next two months, Nacho Monreal is the natural replacement for the Bosnian.
Cech made several saves to keep Arsenal in the game but also seemed to struggle a bit when playing with his feet, almost scoring an own goal in the first half when he mishit a back pass from Guendouzi. He looked uncomfortable with the ball at his feet and seemed to suffer from a lack of confidence after conceding the opener. Subs: De Bruyne 5, Jesus 6, Sane N/A. Drifting past a flurry of Arsenal defenders to score the first goal was phenomenal but it was contribution afterwards that made him one of the more consistent players on the pitch.
While others bemoaned their lack of signings and questioned their club hierarchy's pre-season preparations, most notably Guardiola's nemesis in the red half of Manchester Jose Mourinho, the Catalan had nothing but praise for his squad and his employers, saying: "I can not complain for one minute". And we count on him.
MF Aaron Ramsey, 6 - It was a big boost to Arsenal to see the Welshman passed fit, and he was the man charged with spearheading Arsenal's new pressing system.
Taking possession on the left edge of the Arsenal area, Sterling glided past Hector Bellerin and Guendouzi before drilling a fierce shot that flashed past the unsighted Cech from 18 yards.
Should Emery take note and elect to start Lacazette with Aubameyang, a sluggish Mkhitaryan looks most in danger. It's been a good pre-season by all accounts and a full-season of Pierre-Emerick Aubameyang would suggest goals won't be a problem. "It's just one of those things I get judged on".
Wenger left Arsenal in a mess after last season's sixth place finish and Emery acknowledged the gulf in class between City and his team showed how much work he could do.