++ [ originally posted by Erik ] ++
I would say Holland-Germany, except there is not so much hate in this rivalry and there is also some sort of odd, but large, mutual respect.
Fenerbache - Galatasaray
Barcelona - Espanyol
Roma - Juventus (not as it used to though, but I wanted to mention it. )
Boca - River
Danubio - Nacional
Arsenal - Man utd