Fiorentina have made Mohamed Salah an "insane offer" as they attempt to secure his services from Chelsea, according to club director Vincenzo Guerini.
Salah, 23, spent the second half of last season on loan at Fiorentina, scoring six goals in 16 Serie A appearances.
La Viola have an option to retain the Egypt international for the 2015-16 campaign, but his agent Ulisse Savini said earlier this month that it will ultimately come down to Salah's decision.
Fiorentina are keen to keep Salah, with Guerini confirming a lucrative proposal has been submitted to the player.
"I tell the fans that the club has made an insane offer to Salah," Guerini said in The Guardian.
"If any player, not just Salah, turned down a proposal like that, then it's best he doesn't stay at Fiorentina.
"However, I think Salah will accept. He made a huge impact with us, so it's normal that he should receive calls from elsewhere. He wants to earn more, but Fiorentina made a truly important proposal."
Sources told ESPN FC last month that Tottenham were interested in signing Salah.