The fierce rivalry between Bayern Munich and Borussia Dortmund, widely known as Der Klassiker, stems primarily from sporting dominance, competitive tension, and historical context within German football. Over recent decades, Dortmund has emerged as the most consistent and formidable domestic challenger to Bayern Munich's traditional hegemony in the Bundesliga. This competitive friction intensified during the late 1990s and early 2010s when Dortmund secured back-to-back league titles under Jürgen Klopp, directly interrupting Bayern's domestic supremacy. Furthermore, high-stakes encounters—such as the all-German UEFA Champions League Final in 2013 won by Bayern—along with frequent player transfers between the two clubs, have continually fueled intense emotions among supporters and pundits alike.