The former Toulouse star was a confirmed target for Marseille last summer.
Sissoko told SFR Sport: "When I look at the French league, yes I miss it a bit.
"This is where I started, I have a lot of friends who still play there, I think it would be nice to play against them. But at the same time, I am very happy to be here.
"It's a championship where I always wanted to be."