Sunday's derby match between Panathinaikos and Olympiacos was abandoned after tear gas drifted into Athens' Olympic Stadium and affected players and fans.
Panetolikos and PAOK fans clashed in the streets of Agrinio ahead of their Greek Super League match on Saturday.
Egaleo hooligans clashed with riot cops before the side’s third division match against Chalkida on Sunday.
Clashes broke out between Olympiacos hooligans and riot police at the Georgios Karaiskakis Stadium on Sunday after Olympiacos lost 2-1 to AEK.
The Greek Cup final between PAOK and AEK was delayed by about 30 minutes on Saturday after serious clashes involving two groups of hooligans before the kick-off.
PAOK and Iraklis fans clashed in the streets of Thessaloniki on Sunday.
PAOK's Greek Cup semi-final against Olympiacos was abandoned on Wednesday as home fans clashed with riot police on the Toumba Stadium pitch.
Diagoras fans invaded the pitch and attacked Ialysos fans.
Clashes between Atromitos and AEK fans after the end of the game.
Panathinaikos hooligans rioted both inside and outside the Apostolos Nikolaidis Stadium.
Aris fans clashed with riot police inside the ground during the first half of their third division match with Nestos Chrysoupolis on Sunday.