Sissoko is currently at Toulouse but he has been linked with a move elsewhere and concedes that it will be a difficult decision.
Newcastle United and Juventus are among the clubs to have been credited with an interest and Sissoko finds the idea of playing in the Premier League or Serie A appealing.
However, he is not ruling out a switch to Russia either, following reports that big-spending Anzhi Makhachkala are keeping tabs on his progress.
"I have not yet decided what to do, I'm in a phase of reflection," the midfielder told calciomercato.com.
"Juventus, Newcastle and Anzhi interested in me? I know nothing about it. Of course all these rumours please me, but that is the business of my agent, my uncle Bakary Sanogo.
"I have no preference about the type of league, the important thing for me is to play at a high level.
"Italy and England are historically among the major championships, but I want to clarify that I would not have any problem even to go to play in Russia."