Mihajlovic was with Inter as both player and assistant manager to Roberto Mancini.
"I hope Inter win the Scudetto, but tomorrow I want to win the game," smiled the Serb.
"I think it's easier to beat them now than a year ago when I was in charge of Catania for two reasons. Firstly, Fiorentina are stronger than Catania and secondly last term's Inter were a complete squad, whereas now they have a few absentees.
"Tomorrow is a very important match against a great team that can give us a sense of consistency in our results.
"Winning would be wonderful and I hope to prepare for it well, but will try to stay out of the emotional sphere surrounding this fixture for me. I am concentrated and calm, so I hope the lads are too."