On 5 July 2003, he became the youngest player to debut in the Argentine Primera División at 15 years and 35 days, breaking the record previously established by Diego Maradona in 1976.
In 2006, Agüero moved to Europe to play for La Liga side Atlético Madrid for a fee of €23 million from Independiente. He made a name for himself, attracting attention from Europe’s top clubs by scoring 101 goals in 234 appearances while winning the UEFA Europa League and the UEFA Super Cup in 2010. Agüero moved to Premier League club Manchester City in July 2011 for an undisclosed fee thought to be in the region of £38 million.
In his first season at Manchester City, Aguero surpassed 20 league goals as City went on to win the Premier League. Arguably Aguero’s greatest achievement in a Manchester City was his goal to win the club the Premier League title.
After scoring that goal, Aguero had this to say:
“In my career so far it’s the most important goal. You score the goal in the last minute to win the title. You’re not sure if that’s ever going to happen in your career again. I wish I could tell you how I did it but I can’t. I thought for all the world that Mario Balotelli was going to have a go himself but he just moved it on one more and it fell at my feet and I just thought: ‘Hit the target, hit it as hard as you can and hit the target.’ And it went in”.
Five straight wins had helped City wipe out the 8-point deficit. Now leading on goal difference going into the final days’ fixtures, they faced relegation-threatenedQPR, needing only to match or better United’s result at Sunderland. Pablo Zabaleta scored in the 39th minute to give City a tense 1–0 lead. However, QPR equalised in the 48th minute after a mistake from Lescott when trying to head the ball back to Hart allowed Djibril Cissé on goal. Shortly after the restart, Rangers were reduced to ten men when Joey Barton was sent off for elbowing Carlos Tévez, an act of retaliation for a kick, and was spotted by a linesman.
Despite this, QPR took a shock lead in the 66th minute with Jamie Mackie scoring only their third shot on the Manchester City goal.
Title hopes dwindling, and with City running into a QPR defensive wall, manager Roberto Mancini sent on strikers Edin Dzeko and Mario Balotelli in an attempt to get the two goals City now needed for the title. Injury time beckoned and two goals seemed a forlorn possibility, City’s dominance in possession only translating into the single goal over the normal 90 minutes.
However, an equalising goal from Edin Dzeko, off a David Silva corner, in the 91st minute gave City a small glimmer of hope, with 4 minutes of the allotted five minutes injury time left to play. In the 94th minute, Agüero, 35 yards from goal, passed to Mario Balotelli just outside the box, then continued his run into the QPR penalty area.
Mario Balotelli turned, laying on the pass which Agüero took, slid past two defenders and placed the ball low past Paddy Kenny hitting the back of the net, clinching the win and the title for Manchester City. Agüero’s goal sent theEtihad Stadium into a frenzy and he was dragged to the floor jubilantly by his City team-mates.
Vincent Kompany recalled that Agüero was crying on the floor, and when asked if he cried during the Manchester City parade the following day, Agüero stated: “Yeah, a little”.
On 4 May, Agüero was named Manchester City Player of The Year. His first goal in the 6–1 away win against Norwich also won him the club’s “Goal of the Season” award.