The Sunday Mirror says Balotelli was left out of the City squad for Âyesterdayâs trip north to Newcastle.
Mancini made clear his anger, amid claims that the playerâs training had not been up to standard in the past few days.
Questioned on why ÂBalotelli didnât travel to the north east, Mancini Âreplied: âMario is not in good form at the moment.
âIt is better for him to train well.
âHis form is not good enough to play.â
Privately, the City boss now wonders whether ÂBalotelli will ever fulfil his potential.