Chelsea have suffered a setback in their pursuit of Federico Chiesa.
The Blues are eager to sign the winger in the summer to bolster their attacking options.
But the Italian club want a straight cash deal for the player who has scored seven and provided five assists this season.
Fiorentina know that cash is king at a time when all football clubs are struggling financially.
And they want to ensure that if they lose a talent such as Chiesa, they are getting enough money to rebuild the team to their liking.