The Argentine striker returned with a goal as a substitute in Wednesday night's 5-0 FA Cup rout of Blackburn Rovers after missing eight matches with a calf injury and is now targeting the Catalan giants in the Round of 16 first leg on February 18.
"I'm very happy. I couldn't wait to come back. It's been a great recovery," he told City TV.
"I trained with the team on Monday for the first time and here I played some minutes to start bringing myself back on form and to find my pace to play in such a fast football game.
"Maybe in a week I'll be on top form. Obviously the more you play the better you feel. Against Barca I will be ready.
"I hope I can play a little bit longer on Saturday and take it step by step."
Aguero, who has netted 20 goals in 21 outings in all competitions this season, is expected to get more valuable minutes when City host Cardiff City in the Premier League on Saturday.
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