Inter coach Roberto Mancini admitted before deadline day he was keen to sign the Ivorian.
Ausilio said: "Yaya Toure is a true great, but almost impossible [to sign]. We're fortunate to have a coach who spent a few years with him, so if there's a chance through Mancini we'll try, but at the moment it's almost impossible.
"I can't deny we'd like a player like him, but I also know that he's at City. All we can say is that we like him, but we're right on the edge of impossible and it would take something extraordinary."
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