Susic's agent has revealed an informal agreement has already been struck with Inter.
"We haven't signed anything yet," explained Sabatino Durante to FCInterNews. "There is an informal agreement between us and Inter, yes, but nothing official as of yet.
"We can't formalise anything until January 5, and until then anything can happen, though I doubt we'll see a reversal because the player's desire - as well as my own - is to close the deal with Inter, even if there are some teams that offer more from a purely financial point of view.
"[Coach Roberto] Mancini has liked Susic since his time spent coaching Manchester City, though nobody back then wanted to publicise the operation. Galatasaray were after him too, but the conditions were missing to make it happen.
"We also have a great relationship with the Inter management and we already spoke to them one year ago.
"We can say that Mancini simply accelerated the process and gave his consent, but [sporting director Piero] Ausilio had been following him for some time."