There are so many different types, after all. Derbies between teams that share stadiums or cities; derbies between teams from either end of an island, or lake; derbies between teams whose fans slighted one another decades ago by accident. Even some derbies between teams based hundreds of kilometres apart. And when there still are not enough derbies to go around, the national press are usually happy to invent a new one. On Sunday multiple news outlets heralded the inaugural "Wanda Derby" between Sampdoria and Internazionale.