Mario Balotelli's agent insists 'all doors remain open' and that Manchester City is not guaranteed to sign the 19-year-old.

That is despite reports claiming that the Citizens are ready to up their stakes in order to fend off competition from fellow suitors Manchester United and Chelsea.

Inter president Massimo Moratti has also acknowledged he is well aware of City's interest in the problematic teenager with club sources confirming a bid from the Premier League club, which was subsequently rejected.

While the Sky Blues are widely tipped as favourites to secure Balotelli's services, the player's agent Mino Raiola refused to give any hints on the eventual destination of his client.

Raiola told Sky Sports Italia: "His future won't be decided now, we are moving calmly.

"I don't really want to say more on Balotelli, but all the doors remain open. My job is to listen to offers.

"Which club is most interested? I cannot say this, it's not down to me to reveal who is interested. All the roads are open."