Revierderby

Revierderby ("Derby of the Area"; Revier (territory) being a colloquial form for the Ruhr area) is the name historically given to any football match played between two clubs of Ruhr area, in North Rhine-Westphalia, Germany. Strictly speaking, Revierderby almost always refers to matches played between Borussia Dortmund and Schalke, while a match between two other Ruhr Area teams will often be denoted as a Kleines Revierderby ("Small Revier derby").