The Italian firebrand is continually defended by his boss who feels he has so much to offer to the City line-up but after leaving him out of his match day squad for Saturday's 3-1 win at Newcastle United, Mancini admits there is an element of annoyance as to what Balotelli can and cannot produce.
"Mario is not in good form so he is at home," Mancini said regarding the St James' Park absence.
"To get back into the team he needs to work in training and when he plays. He needs to play well. I have to talk about him every day and I am not frustrated about that.
"But I am frustrated in that I would like Mario to play well because he has great quality.
"He still has a big part to play this season - absolutely - because he is a good player and a huge talent with good quality and a good technique, but it is important that he puts all these things on the pitch."