Peter Katsiris May 1, 2020 Ethniki (Basket) Ethniki alumni hoping to usher in new era for Greek basketball Peter Katsiris May 1, 2020 Ethniki (Basket) ETHNIKI (BASKET): Efthimios Rentzias is the latest Greek basketball veteran to declare he’ll seek election to the EOK board in the upcoming election as basketball in Greece approaches a new dawn.