Cerci won't come in January, there's no way Torino would let him go in the middle of the season, especially to us.
They only would make an exception if an unreasonably high offer would arrive, but we all know Marotta won't do that - and he's right. Also, while I like him, I'm still not quite sure if he's just incredibly on form or if he's really that good, perhaps it's better anyway to wait until the season is over and if he can mantain the high level of his performances consistently over a longer period of time.