Vassilis Spanoulis is a Greek professional basketball coach and former player, who is currently the head coach of the pro club Peristeri Athens, of the Greek Basket League, as well as the head coach of the senior men's Greek national team. Spanoulis, who during his playing days was nicknamed "Kill Bill" during his professional club playing career, was a FIBA World Club Championship champion, a Triple Crown winner, a 3 time EuroLeague champion and 5 time EuroLeague finalist, a FIBA Europe League finalist, a 7 time Greek Basket League champion and 13 time Greek Basket League finalist, and a 4 time Greek Cup winner and 9 time Greek Cup finalist.

The Greek Basket League (GBL), often also referred to as the Greek A1 Basketball League, or Greek Basketball Championship, is the first tier level professional basketball league in Greece. It is run by HEBA, under the legal authority of the Hellenic Basketball Federation (E.O.K.).