Ljajic has reportedly been in talks with Fiorentina over a new contract, and Alex Vaiata said that discussions are still ongoing.
"We know of AC Milan's interest, even if they have not contacted Adem," Sky Sports News quotes him as saying. "They talked directly to Fiorentina and it's up to the two clubs to decide and try to reach an agreement.
"There has been no negotiation about a new contract because the player was not in Florence, but now there will be a way to talk with Fiorentina and we'll see if there is a chance to extend.
"However, if they decided to sell him at Milan, we will consider this hypothesis."
Ljajic played for Partizan before moving to Viola in 2010.