Modibo Diakite's agent has indicated that the midfielder would be willing to return to Fiorentina next season.
Following a frustrating start to his Sunderland career, Diakite was loaned to the Italian club in January, and his representative has suggested that a permanent move is a possibility ahead of the transfer window.
"The player is simply on loan from Sunderland, we'll talk with Fiorentina to know if there is the will to keep him," Ulisse Savini told Lady Radio.
"From our side there is maximum availability to stay, Modibo is happy in Florence and in the team.
"Now we have to also understand if Sunderland will want to focus on Diakite or if they evaluate the player as they did in January, in which case they would ask for money to let him go."
Diakite moved to the Black Cats on a free transfer from Lazio last summer.