Cristiano Guintoli made it clear that the Guinean midfielder is not for sale.
Tottenham linked with huge bid for Amadou Diawara.
The Guinean has joined the Italian side despite interest from Villa.
The Guinean international has been linked with plenty of clubs this summer.
Aston Villa have been heavily linked with the Guinean.
Diawara's agent confirms Villa's offer but gives little away.
Aston Villa are reportedly pushing to sign Bologna ace Amadou Diawara.
The 19-year-old has been linked with a surprise move to Villa Park.
The Championship new boys have reportedly made a £14.5 million offer for the 19-year-old Guinean, but they may face strong competition for his signature from the likes of Napoli and Roma.
Sunderland do not want to let Emanuele Giaccherini go on the cheap.