Lazio president Claudio Lotito is prepared to sell Sergej Milinkovic-Savic this summer.
Lotito says if the Serb wants to leave, he won't stand in his way.
PSG and Juventus are interested in the midfielder, while he has also been a long-term target for Manchester United, where younger brother Vanya was once on the books.
"At Lazio we keep only those who have the pleasure of staying. We will not stop him," said Lotito.
Asked about a price, the president added: "I just remember that he was judged as the best Serie A midfielder."