As a big football fan, yes football not soccer ;), I like the idea. But if you focus on derbies then stick to derbies. Real Madrid - FC Barcelona is great, but

As a big football fan, yes football not soccer ;), I like the idea. But if you focus on derbies then stick to derbies. Real Madrid - FC Barcelona is great, but not a derby. Same for Bayern - Dortmund. Derbies are matches between local teams. Maybe put non derbies in a separate list on your website with a link like "not a derby, but still a great rivalty".