Man City boss Mancini "very satisfied" after thrashing Villa
City's form has been under scrutiny but they remain unbeaten in the competition and are well on course in their title defence.
Mancini said: "I am very satisfied with this performance.
"In the first half we played well created a lot of chances but we were too soft when we had chances to score.
"But we played well and this is the most important thing.
"In the last two games I think we changed something. In our mind we found a good spirit, like last year.
"For us it is very important we start to play well and in the last two games we have scored six goals with our strikers. I think we have been missing their goals."