Yesterday, Football Italia reported that Manchester City and Inter Milan had reached an agreement on a transfer fee for Citizens striker Stevan Jovetic. However, the deal is not yet *final* due to the fact that the two sides have yet to agree upon the actual payment method.
Apparently Jo-Jo's agent was in Milan yesterday to negotiate with Inter management, who we know are desperate to sign a new striker by the end of this week. Following that meeting, La Gazzetta dello Sport reported that a deal had been struck in which Jovetic would sign a four-year contract with Il Biscione and City would receive €20 million.
In order to pay such a fee, Inter are planning on using (yup, you guessed it) the patented (it's not patented) "Inter Formula." The Italian side have requested to pay the amount over four years, and this request is the main hang-up blocking the completion of this particular deal.
City are (understandably) reluctant to acquiesce, which means that they'd want Inter to pay €20 million up front. With the grey cloud of FFP hanging over their heads, Inter would likely not be able to pay such a large fee all at once, which would mean either re-negotiating the deal or dropping it entirely.