News of the World says the Santos starlet was expected to join City as part of the deal that saw Robinho join the Brazilian side on loan in January.
But Chelsea are reportedly ready to exploud a potential breakdown in the agreement, as Robinho could be forced to return to Eastlands as the Brazilian side fails to pay his wages, according to reports.
Reports have several times suggested that Real Madrid have signed a pre-contract agreement with Neymar, but that his something Santos deny.
