Celtic have told Sampdoria and Atalanta that Italian midfielder Massimo Donati is not for sale.
The 27-year-old is being linked with a return to his homeland with Sampdoria leading the chase for his signature.
Sampdoria's general manager, Andrea D'Amico, said: "The player seems willing to come here but the problem is Celtic want too much money. At the moment the price they want is incredible."
However, Bhoys boss Gordon Strachan is believed to have made it clear that Donati will not be leaving the club this summer.