Thereau also admits he fancies a move to AC Milan.
"The club knows that I am a man on the market, it is most likely that I will leave," Thereau told TuttoMercatoWeb.com.
"I believe that my future will be more clear in one or two weeks' time.
"Fiorentina? It is true, my agent has spoken with them. But there is still nothing concrete. Now we must wait and see what happens.
"Milan? It is one of the team that I would go to, we are talking about a very important club. Milan are at the top, I would be fine - I have shown that I am ready to play for an important team.
"It is clear that playing for Milan is not the same thing as doing so with Chievo.
"But for me today, this is the time to make the leap. Milan is one of the most important teams in Europe, [former Chievo teammate Kevin] Constant plays there.
"There are other clubs also interested. We'll see in one or two weeks from now. We need to wait.
"Surely I would like to stay in Italy. And I am ready for the leap, whether it is Fiorentina, Milan or another big team like these two."