6) OLYMPIAKOS v PANATHINAIKOS -- Athens, Greece
This is the derby between the two giants of Greek football, although the rivalry between the two also exists in basketball, Greece's national sport. In the past, Olympiakos, from the port area of Piraeus, used to represent the working class, while Panathinaikos represented the upper-class suburbs of Athens. Nowadays, the situation has evened out. However, on the pitch, Olympiakos are the dominant club, having won 11 of the last 12 league titles, including the last four in a row.