The Croatian's agent Vincenzo Cavaliere previously revealed that he could leave the East Midlands in January and has now claimed that "dozens" of sides are interested in his signature.
"We're talking about dozens of teams, in Italy and abroad, and nothing is concrete or definite yet," Cavaliere told CalcioMercato. "Let's say we're in a preliminary phase, we need more time to have greater certainty."
The Daily Mail reports that Serie A side Torino are leading the chase but would prefer a loan deal of £400,000 plus his salary.
Italian leaders Inter Milan and Bundesliga strugglers Stuttgart have also been credited with an interest.