Eintracht Frankfurt have reportedly asked Milan for €40m in order to purchase Ante Rebic, with up to €20m of that going to Fiorentina.
The attacking winger arrived on a two-year loan in exchange for Andre Silva going the other way on transfer deadline day, so there was no time to work out purchase options.
After barely seeing the pitch during the first half of the season, Rebic has become unmissable for new coach Stefano Pioli in the 4-4-2 formation.
The Croatia international now has six goals in the last seven Serie A rounds.
According to Tuttosport, Eintracht Frankfurt have opened with a demand of €40m to part with the 26-year-old.
Fiorentina could benefit from a big windfall, because when they sold Rebic to the Germans in 2018 for €2m, this included a clause giving them 30-50 per cent of the future transfer fee.
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