The prolific Argentinian came to City's rescue to ensure they avoided an FA Cup shock against Watford with a second-half hat-trick.
The 25-year-old said: "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."
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