Welcome to the Athens derby.
Olympiakos won 3-0, but the default result won't live long in the memory.
Crowds of Panathinaikos and Olympiakos fans fought outside and inside the Olympic Stadium.
The match was interrupted twice before being postponed. The second half was delayed for 45 minutes as fans fought running battles with police, throwing flares, seats and anything else they could get their hands on.
Its not clear what sparked the destruction.
Several petrol bombs exploded close to the pitch.
Twenty police officers were injured and over 50 arrests were made.
Bad behaviour from Panathinaikos fans earlier this season led to a match being played behind closed doors.
When these two meet, it is known as the "Derby of Of Eternal Enemies".
Sunday's scenes could result in the mother of all fines, and points deduction for the home side.