Lazio president Claudio Lotito insists Sergej Milinkovic-Savic is not for sale.
The midfielder has been linked with a big club move away this season.
“How much is he worth?" Lotito told Corriere dello Sport.
“I don't care, he's not for sale! He's like me, he has the same character, spirit of sacrifice, and he has courage.
“When his father 'convinced' him to go to Fiorentina, he - who already had an agreement with us - arrived there and explained 'I only want Lazio'.
“That says it all, for me.
“Can we make the Champions League? We've been able to overcome complicated moments, misfortunes. If we're united to the end like we are now…"