City's star striker was suspended for Saturday's clash and there were a lot of people who thought his absence would doom the Citizens. Instead, Pep Guardiola turned to 19-year-old Kelechi Iheanacho, who did well enough to make City a threat. He was no Aguero -- who is? -- but City didn't need him. They will happily take the Argentine back when his ban ends, though.
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Kevin De Bruyne is otherworldly
Part of the reason City were able to cope without Aguero was the sensational play of De Bruyne. If there was any concern about his ability to play in Guardiola's system, that's gone. He was terrific to start the season, and against Manchester United he was the best man on the pitch. His passing, vision and movement were second to none and he added the opening goal to boot. You could make an argument for him as the league's best player right now.
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Claudio Bravo was nearly a disaster
Manchester City shipped out Joe Hart because Guardiola wanted someone who was better with his feet and a better fit for his system. That was supposed to be Bravo, but the goalkeeper nearly lost City the match on Saturday. His mistake led to United's only goal and he could have been called for a penalty in the second half that would have gifted the Red Devils an equalizer. It was a horrible showing for Bravo, who City will be hoping improves as he gets used to his teammates and league. But he certainly dodged disaster on Saturday.
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United's midfield still needs work
Mourinho hasn't quite figured out what to do with his team yet. Marouane Fellaini, who had done a decent job early in the season, was exposed against City, but it's not like Mourinho had a ton of other options to go to. After all, he's still playing Wayne Rooney in a pseudo midfield role. Figuring out what the Red Devils midfield will look like is still a work in progress and will probably take another transfer window or two. Mourinho can get away with it on most days, but not against City.
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Guardiola victorious again
Once again, Guardiola got the better of Mourinho. After a summer of hype for the managerial rivalry, things went as they often have for these two. It was close, heated and occasionally hectic, but in the end, Guardiola came away with all three points. It didn't matter that City were away or missing Aguero. Guardiola is still on top.