Greek champion Olympiakos began its defense of the Super League title with a convincing 3-0 home victory over Panionios on Sunday.
The Reds were comfortable winners on the first day of the new season, which saw title rivals PAOK, managed by Croatian Igor Tudor, held to a 0-0 home draw against Xanthi.
There were wins for Super League newcomers Iraklis and AEK, who were back in the top flight after 3- and 2-year absences respectively.
The results on Sunday were as follows:
Kalloni 0 v Iraklis 1
Panthrakikos 0 v Asteras Tripolis 2
AEK 3 v Platanias 0
Atromitos 1 v Levadiakos 0
Veria 1 v PAS Giannena 1
PAOK 0 v Xanthi 0
Olympiakos 3 v Panionios 0
The last game of round 1 takes place on Monday evening in Agrinio, where Panaitolikos takes on Panathinaikos.