At the age of nine he joined Independiente, the team he always supported, after showing great promise in several small-town teams such as Loma Alegre and Los Primos.
A few years later, maybe much earlier than expected, he would fullfil another dream: making his debut in the top division. He was 15 years, one month and three days old when Oscar Ruggeri, by then Independiente's coach, sent him in as a replacement for Emanuel Rivas with 21 minutes to be played in a game against San Lorenzo.
Thus, Agüero broke Diego Armando Maradona's record and became the youngest footballer to play an official game in the Argentine top division. Even though seven months would go by before he would be considered to start a game with the team, Agüero had already showed great promise and appeared to be the new icon of Argentine soccer.
By 2005 the offers from Europe started arriving and he was transferred to Atletico Madrid.
Strengths: His ball control and powerful bursts make him almost unstoppable in the box.
Weaknesses: Sometimes lacks focus and can be selfish with the ball
Career high: On March 1, 2008, against Barcelona, he scored twice and was man of the match; by far his best performance with Atletico.
Career low: Except on isolated occasions, he not yet been able to shine with the national team.
Style: He is often compared to Brazil's Romario.
Quotes: "I would tell him to go to Inter, head on," said Maradona about Agüero, currently his son-in-law and grandfather to Aguero's son, when the Italian club was interested in him.
Trivia: A
cumbia band called Los Leales recorded with a song with Sergio Agüero as the lead singer. The song was written in his honor and is called "El Kun Agüero".
Soccernet says: Agüero is a young player with a long career ahead of him. He is talented, but has a lot to improve in his game. In any case, he will provide a good alternative in the Argentine attack for the World Cup.