Balotelli has been a revelation since signing for the Rossoneri.
"His teammates miss him very much," Mancini told Panorama. "They miss his genius. He can do what others cannot even think of. We are all very happy he is doing well at Milan.
"Mario has everything to be one of the best in the world, but at the moment he only uses 50 per cent of his ability.
"That is what made me angry."