Inter Milan striker Mario Balotelli is flattered by interest from Manchester United and City, but insists he has yet to show his best form.
City appear favourites for the Italian's services after manager to bring him to Eastlands.
The pair worked together during Mancini's spell in charge of Inter, and the 19-year-old has fallen out of favour since his departure.
Speaking on the prospect of a move to the Premier League, Balotelli told Corriere dello Sport: "Roberto Mancini? He's a great coach, I debuted in Serie A with him because he is a great friend.
"If he and (Sir Alex) Ferguson want me, it means I'm not as bad as I thought.
"United is a great club. They have not seen the real Balotelli, for sure I need to learn and achieve more goals. I want to win the Golden Ball in 2011. As for the future, I always say I don't know."
Former Liverpool boss Rafa Benitez has recently taken the helm at the Giuseppe Meazza following Jose Mourinho's departure to Real Madrid.
Pre-season is yet to begin for the Italian giants, and Balotelli confirmed the only way he would stay at Inter is if he is promised regular first-team football.
He added: "I expect an important year for my career. Now I'm on vacation, I am resting and recharging for a good start to the season. If you want to know more, ask my agent Mino Raiola.
"Benitez? I don't know him yet and I can not judge him. I hope to know him soon.
"(President Massimo) Moratti? It is nice that the president considers me an important part of the club, but I need to play. I cannot be important and not play."