Britain's most expensive footballer announced his desire to leave and return on loan to his former club, Santos, during a radio interview in Brazil over the weekend.
And while Mancini and City's directors made it clear on Sunday night that £32.5million Robinho will be going nowhere if the deal does not suit them, the chances of the 26-year-old remaining at Eastlands appear increasingly remote.
On the runway: Robinho celebrates after scoring City's final goal
Mancini selected Robinho in his starting line-up for Sunday's FA Cup tie at Scunthorpe and he did score the fourth of City's goals in a 4-2 win that secured a fifth-round home tie with Stoke, who had earlier stunned Arsenal by knocking them out with a 3-1 win at the Britannia.
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