The rivalry between the two top Greek clubs can be traced back to some social, cultural and regional differences. Panathinaikos comes from Athens and was considered the classic representative of the old Athenian society and culture. On the other hand, Olympiacos comes from Piraeus and used to represent the working class. However, this kind of clash was much more pronounced in the past, as the class differences between the fanbases have faded out and the social gap that once separated the two sides has closed over the years. Nowadays, both clubs boast fanbases that represent all the social classes.
Basketball rivalry
Panathinaikos and Olympiacos are the two most successful basketball teams in Greece. The eternal enemies are the most traditional basketball powers as they have been fighting in the top level of the Greek basketball scene longer than any other team.
Their rivalry is highly credited, especially in the 1990s-2000s, when they met each other in several regular season and playoff series, and in some EuroLeague matches which marked their history.
1 Panathinaikos didn't show up in the match, so Olympiacos were awarded a 2–0 win. 2 Match suspended with 2 minutes remaining in the third quarter due to crowd violence (score: 52–62). Panathinaikos were awarded the win with the score standing. 3 Match suspended with 1:03 remaining in the final quarter due to crowd violence (score: 69–76). Panathinaikos were awarded a 0–20 win. 4 Match suspended with 1:27 remaining in the final quarter due to crowd violence (score: 72–76). Panathinaikos were awarded a 0–20 win. 5 Olympiacos didn't show up in the match, so Panathinaikos were awarded a 0–20 win. 6 Olympiacos didn't show up in the match, so Panathinaikos were awarded a 20–0 win. 7 Olympiacos didn't show up in the match, so Panathinaikos were awarded a 0–20 win.
• Matches won: Panathinaikos 120, Olympiacos 98. (Reg. season 67–53, Playoff 53–45)