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.).

Panathinaikos B.C., also known simply as Panathinaikos, currently also known as Panathinaikos AKTOR Athens for sponsorship reasons, is the professional basketball team of the major Athens-based multi-sport club Panathinaikos A.O. It is owned by the billionaire Giannakopoulos family.