The 10 Most Extreme Football Club Rivalries Ollie Irish 7th, September 2010 45 Comments By Ollie Irish Not pure city derbies, but general rivalries (many of which happen to be derbies)… panathinaikos_gate13-jpg1_ ◄ Back Next ► Picture 4 of 10 7. Panathinaikos v Olympiakos (Greece) - Another Eternal Derby, the derby between the two main clubs in Athens often kicks off in ways that make West Ham v Millwall or Liverpool v Man Utd look like child's play