The Gabon international is wanted by Atalanta.
Speaking to The Mirror, the 25-year-old midfielder said: said: "I still have another three years of contract. But it is true that I do not rule out the possibility of seeing something else.
"The last four months have not been easy for me, with my injury. The coach put his team together. I want to start afresh. So why not leave?
"We have very good discussions with the club. We are in agreement. If I don't feel good in this project, I can leave.
"They are giving me the opportunity to be able to go elsewhere."
He added: "We are working on it with my agents, we are not putting ourselves under any pressure.
"We are waiting truly for the best project, the best offer. We look at it day by day.
"For the moment, I am at Southampton and I am working the best I can to be the best possible form."