The reigning Premier League champions won 4-0 at home to move into the quarter-finals and Argentine ace Aguero, who scored twice, believes the confidence is returning ahead of this weekend's meeting with third-placed Chelsea.
"This helped us do things well and give us confidence for the Chelsea game," he told City TV."It will be a good match. Difficult, but obviously we need to go out and win.
"The truth is we played a great game and we hope we can continue to do so constantly. The important thing was to win and we did, so now we will have a bit of calm and can concentrate on the Chelsea game."