Agent Mino Raiola has previously claimed Inter have already turned down an offer from City and the teenage striker is happy to remain with the Italian champions.
Raiola told Sky Italia: "I don't think any player is untransferable. Each has its price and should there be the player's will to leave, it's difficult keeping a player who doesn't want to remain.
"Mario is now at the world's best side, but let's see what happens in the next few days.
"An agent can't exclude things. A club or the player can do this, not me."