He took his tally for the season to 25, six of which have come in four appearances since he returned from a month-long injury absence.
Sergio Aguero: "The important thing is the goals contribute to the team's victory, the team wins and we win titles.
"I don't have any specific goals to reach - but as many as possible.
"We weren't expecting to score four goals. We knew at half-time we needed to improve and in the end we won and we have made it to the next round. We are happy with that."