Sako says the chance to play again for St Etienne is attractive.
The midfielder told SFR Sport: "Consider a return to France and ASSE?
"In France, I do not know, but Saint-Etienne, yes, it is something that is really probable. It's true that I always wanted to work again with Christophe Galtier, he was like my second father in Saint-Etienne, and I have an extraordinary memory of him.
"So why not?"