Argentina striker Sergio Aguero already considers himself a Manchester City player and despite the deal not yet being completed he was welcomed as such by delighted fans outside the Etihad Stadium.
After undergoing a medical at a private Manchester hospital and then holding discussions with City officials, the son-in-law of Argentina icon Diego Maradona happily signed autographs for the growing crowd of fans who had gathered to see their new hero.
"I'm already a City player. Happy to be in this club & this city," he wrote on Twitter afterwards. "Thanks everyone for the welcome and reception."
Aguero is slightly premature in announcing himself as City's latest superstar but the completion of the deal is not far away, with a few administrative issues set to be wrapped up on Thursday when his transfer will be officially confirmed.
Just after touching down in the north-west earlier in the day, Aguero wrote on Twitter: "Just arrived in Manchester to finalise the details of signing with City.
"Everything is going very well! I'll tell you more in a while."
City's previous record signing was Robinho, who arrived from Real Madrid for £32.5million as new owner Sheikh Mansour, a member of Abu Dhabi's ruling family, made a marquee signing to signal his intent just days after taking over in August 2008.
The Aguero deal is believed to be about £35million, which incorporates add-ons - short of the £38million buy-out clause inserted in the new contract the player signed with Atletico in January.
He is reportedly set to agree a five-year contract worth about £200,000 per week.
With City striker Carlos Tevez adamant he wants to leave to be nearer his wife and two daughters in Argentina, Aguero is seen as the ideal replacement.
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