The 23-year-old will see his current deal expire in the summer, and it has been reported that a pre-contract agreement has been reached with Newcastle.
Sissoko is refusing to reveal too much at this stage, but has admitted that a switch to St James' Park would appeal to him.
For now, though, he is keen to see out the season in France and keep his options open, with Juventus and Marseille also believed to be keen on acquiring his services.
"I will wait until the end of the season and decide what to do," said Sissoko.
"I might stay here, who knows. In football, strange things happen.
"Newcastle are a good team with some French players, so they are attractive to me, but at the end of the season we will see what happens."