Biography: Sergio Leonel Agüero del Castillo, also known as Kun Agüero, is an Argentine former professional footballer who played as a striker. He is considered one of the best strikers of his generation and one of the greatest players in the history of the Premier League, during his decade-long association with Manchester City. He is the club's all-time top goalscorer and holds the record for most Premier League hat-tricks, with 12.