AEK lost at Olympiakos on Wednesday allowing PAOK to go top of the Super League table with its win over Panathinaikos, with one round of games left to play.
Thursday was a glorious night for the Greeks in Europe, with Olympiakos embarrassing Barcelona with a 34-point triumph and Panathinaikos restoring its home advantage.
AEK is now the clear favorite to win a second title in a row as it leads the Super League table by four points after beating crosstown rival Panathinaikos on Wednesday.
Olympiakos has returned to the throne of Greek volleyball, completing the domestic double on Monday with its playoff final victory over archrival Panathinaikos.