Manchester United have made an opening bid for Lazio midfielder Sergej Milinkovic-Savic.
Sky Italia says United are offering 80m for Milinkovic-Savic.
However, Lazio are demanding 100m to sell the midfielder.
The Serbia international has also been linked with Paris Saint-Germain, Inter and Juventus.
Lazio's valuation has fallen from 120m a year ago.
