• Club’s record goalscorer believes this is best City team he has played in • ‘Champions League, it’s not easy but Napoli was a good step for the future’

Sergio Agüero believes there is “no limit” to what he can go on to achieve at Manchester City after his historic goal during their thrilling Champions League victory over Napoli resulted in the Argentinian overtaking Eric Brook to become the club’s all-time leading scorer.

The 29-year-old scored City’s third in their 4-2 triumph at the Stadio San Paolo on Wednesday, sweeping the ball past Pepe Reina to register his 178th goal for the club and write his name into the record books, on a night when Pep Guardiola’s side secured qualification for the Champions League knockout stage with two matches to spare.

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It was a landmark moment for a player whose name is already etched into City’s history because of the dramatic injury-time goal he scored against Queens Park Rangers in 2012 to win the club their first ever Premier League title. Signed at the start of that season from Atlético Madrid, Agüero scored twice on his debut against Swansea and has been prolific ever since. He eclipsed Brook’s record, which had stood for 78 years and dates back to before the start of the second world war, in only 264 appearances.

Passing the 200-goal barrier, which could well be reached before the end of the season, would appear to be the next milestone, although Agüero made it sound as though anything was possible for him at City. “There’s no limit,” he said. “For me, every game is important. Obviously, when I score a goal I’m very happy but above all a player is happy if his team wins. The limit is to keep going in this way and if there are more goals, all the better.”

Although Agüero has scored consistently throughout his seven seasons at the Etihad – his Premier League minutes-to-goal ratio is better than any other player who has made more than 50 top-flight appearances – the striker believes he is currently playing the best football of his career and in arguably the best City team. “Yeah, I think so,” Agüero said. “This year I think we are playing very good, but the other years are different because we have a different manager, different players. This year is new – new players came and we are very good. We have a stronger group.”

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City plan to make a presentation to Agüero on the pitch at the Etihad on Sunday before their Premier League game against Arsenal but he insists his primary focus is on collecting more trophies – he has two Premier League winners’ medals and two from the League Cup with City – rather than personal accolades.

The big question is whether this could be the season that City make a leap forward and win the Champions League. “It’s a difficult question,” Agüero said. “No, Champions League, it’s not easy. I think Napoli was a good step for the future and I hope that we can go as far as possible. I believe we have a great team, but there’s still a long way to go.”