Lanzafame faces his parent club today.
"He started well in the Europa League during the summer," Giovanni Lanzafame, the player's agent and brother, said.
"However, he was badly used in Del Neri's 4-4-2. He was played out of position, a bit like Jorge Martinez.
"Del Neri perhaps thought that he could adapt a few players to his system, but I don't think the results are proving him right. Juve are seventh, 20 points behind Milan "
Lanzafame will go back to the Turin giants in the summer, although his future is far from certain.
"In June he'll return to Juventus to prepare for the Europa League if Juve get there, then we'll see," his representative added.