That's obviously a lot easier said than done, but it seemed to work as City began to play more of their own game in the second-half after being put under pressure in the opening 45 minutes - and a
"They're a difficult team, obviously. If you give them the time and the space to think, they will beat you," Aguero reflected to ManCity.com in the aftermath of the club's greatest European night.
The La Liga visitors took an early lead through Lionel Messi and were on top in the first half, while City were struggling with some of the same problems and mistakes that had contributed to a 4-0 hammering at Camp Nou in the reverse fixture.
Things changed when City began to play more on the front foot and when Ilkay Gundogan scored a few minutes before the interval, the game shifted in the home side's favour.
"We tried to press them when the ball was in midfield, and try to hit them on the counter to see if we could score, and it happened like that, but you always have to respect Barça and any team would respect that," Aguero explained.
"We had to pretend that it wasn't Barça and try to play how we know, and win, which was the most important thing."
City now find themselves with seven points from four games and the win puts their chances of reaching the knockout rounds firmly in their own hands, with games against third place Borussia Monchengladbach (A) and fourth place Celtic (H) to come.
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