Panionios suffered its second defeat of the season on December 10, allowing Olympiakos to go alone on top of the basketball league table a day later.
Olympiakos dismissed KAO Dramas 83-61 despite a poor start to the game that saw the Reds trail 23-12 at the Peace and Friendship Stadium.
Panionios lost 77-67 at AGO Rethymnou, showing how unpredictable the Greek league has become these days.
Champion Panathinaikos scored an emphatic 77-60 at PAOK, just three days after thrashing Zalgiris Kaunas by 35 points in Lithuania for the Euroleague. The Greens are clearly improving and are now looking forward to their top-of-the-group clash with CSKA Moscow on December 14.
Just like Panathinaikos, Kolossos Rhodes is on six wins in seven games, after seeing off host Ilisiakos at Zografou with a 76-70 score.
Aris grabbed its second win for the season, beating Kavala 68-60 away, while Peristeri downed winless Maroussi 67-55.