On 28 July 2011, Manchester City confirmed that Agüero had signed a five-year contract with the club. The fee was reported to be in the region of £35 million. He was given the number 16 shirt for his first season at City and started wearing the shirt name Kun Agüero. He was an unused substitute in the Dublin Super Cup match against Inter Milan and the 2011 FA Community Shield against Manchester United with manager Roberto Mancini believing Agüero was not yet fit. Agüero made his debut for City on 15 August 2011 in a 4–0 Premier League victory over Swansea City. Agüero came on as a substitute in the 59th minute, scoring his first goal for the club within nine minutes after a tap-in from a cross from full back Micah Richards. He then turned provider with an assist after chipping over the oncoming goalkeeper before flicking the ball back into the penalty box and into the path of David Silva to score. Agüero rounded off his debut by scoring again in injury time with a 30-yard strike. His 30-minute debut gained rave reviews among football journalists, with some suggesting it was one of the best in English football.