Pep Guardiola got the better of Arsenal on the opening weekend of the Premier League season.
It was a major clash for so early in the campaign but Manchester City still turned up to the Emirates Stadium as convincing favourites and they showed exactly why on the pitch.
Arsenal never really put on the pressure during the match - barring a lively spell after the break - and City made their chances count.
Raheem Sterling opened the scoring early on with a sweet right-footed strike, only to have Bernardo Silva better him with a crisp volley.
The result extended Guardiola's impressive run against Arsenal since his move to the Etihad Stadium, winning four out of five league matches versus the Gunners.
Man City prepare for Arsenal
Naturally, that means he's managed to take the scalp of both Arsene Wenger and Unai Emery.
And footage from the new Amazon documentary 'Manchester City: All or Nothing' has given an interesting insight into how Guardiola managed to do it.
A scene in the documentary shows Guardiola talking to Mikel Arteta who has proven a very useful coaching tool in games against Arsenal.
Guardiola's Arsenal team talk
The City boss told his colleague: "From now on, you’re going to be studying Arsenal. I want you to write me a report on their attack and defence."
In response, Arteta noted that he: ‘knows how [Wenger] thinks, how he prepares things.'
The documentary then cuts to Guardiola briefing his players on the game-plan, which is based upon the advice and findings of Arteta.
He explained: "Dani [Danilo] and Alex [Zinchenko] has to attack that guy [points to full-back] like a winger, for the other side to move outside,’ says an animated Guardiola, pointing to the board.
"Always the same concept, the third man sends the ball wide… into the net. We find here [in the hole], the third man sends the ball in the right moment."
Sadly for Arsenal fans, that must seem familiar because that very tactic of targeting the full-backs worked an absolute treat for Silva's goal last week.
Take a look at them practising it in training last season and them pulling it off this year:
Pay attention Emery because it seems Guardiola has found a weakness.
Not only that, but there's reason to suggest it could revolve around Hector Bellerin considering these attacks tend to occur on the right, defensive flank.
So, Guardiola had them practicing a tactic last season that worked a treat this year and - as a result - it shows that Arsenal are suffering from the same problem under both Wenger and Emery.
The only saving grace is that the amount of publicity surrounding City's tactics last week will surely wise them up ahead of any future games.
Arsenal are far from the final package right now and its these kind of tweaks that will go a long in making sure they steady the ship.
Where do you think Arsenal will finish this season? Have your say in the comments section below.