Lazio director of sport Igli Tare is confident Stefano de Vrij and Sergej Milinkovic-Savic will stay.
Dutch defender De Vrij's deal expires in June.
“I think De Vrij will sign the new contract. It's not easy to negotiate deals with the Dutch, but the player wants to remain," insisted Tare.
As for midfielder Milinkovic-Savic, there were reported offers of €100m from Manchester United and Manchester City.
“Milinkovic-Savic will certainly be a Lazio player to the end of the season, but I don't know what could happen after that. He is very happy and Lazio are also pleased to have a player like him.
“He does not have a price-tag because he's not on the market."