 Since the 1970s, Bayern's main rivals have been the clubs who put up the strongest fight against its national dominance. In the 1970s this was Borussia Mönchengladbach, in the 1980s the category expanded to include Hamburger SV. In the 1990s, Borussia Dortmund, Werder Bremen, and Bayer Leverkusen emerged as the most ardent opponents. Recently Borussia Dortmund, Schalke, and Werder Bremen have been the main challengers in the Bundesliga.
