A few months after leaving the Spanish club, the 33-year-old announced his retirement from professional football despite having offers from the Saudi Pro League and MLS.
When asked if he could have played for a little longer, the former Blues star said: "Good question. I think so, but I decided playing football was over because I had a lot of injuries, and I have no regrets."
He added: "I enjoy it a lot. I miss my football a bit, especially being with the lads in the dressing room, but I can do what I want now. I have kids and a family. I can go to Belgium to see my family, brothers and parents. I can do a lot of things."