After a government-ordered three-week suspension of the Greek league, PAOK beat Atromitos 2-0 and returned to first place on Saturday.
Also, defending champion Olympiakos came from behind to draw at Levadiakos 1-1.
AEK, a point behind PAOK, hosts Panathinaikos on Sunday.
The league was suspended after a violent end to the PAOK-AEK derby in which PAOK owner Ivan Savvidis stormed the pitch carrying a holstered pistol.
With disciplinary cases pending and appeals to be heard, the final league standings could yet be very different. For example, PAOK is appealing a decision that docked the team three points for incidents in the AEK game.
Savvidis has received a three-year ban.
Elsewhere, Panetolikos beat Giannena 1-0. [AP]