Gennaro Gattuso named Higuain on the bench for Rossoneri's bout with his parent club on Wednesday.
It was reported earlier on Wednesday that Milan had announced the Argentine, currently on loan at Milan from Juventus, had been suffering from a fever.
However, Romano seems to suspect that could have been a mere smokescreen by Milan, a way to deflect attention from the 31-year-old's apparent impending departure.
Reports earlier this week suggested Juventus, who still hold the key to Higuain's future, had rejected an initial loan offer from Chelsea. The Telegraph's Matt Law suggests the move is being held up by various payments Milan had agreed to make to their Serie A rivals, as well as the desire for an option to make the loan permanent.