Milan jumped the gun yesterday, announcing the deal before City were ready.
But after their draw with QPR, Mancini conceded: "I hope he continues to improve to become one of the best players in Europe. The two clubs are still arguing and tomorrow we will probably close the deal, I think Mario has yet to undergo medical examinations.
"We are very sorry, he chose this because he has received a great opportunity to return to Italy and play for a big club like Milan."
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