Lazio president Claudio Lotito has hiked up the price for Sergej Milinkovic-Savic.
Linked again with Arsenal and Manchester United in recent days, the Serbia midfielder is said to be close to joining Juventus.
However, Lotito told Il Messaggero: "I have no agreement with his agent (Mateja) Kezman to sell him to Juventus or anyone else during the winter.
"On the contrary, he is now worth €120m, not €100m.
"The price goes up every month."