Before the away match against Karlsruher SC on 9 March 2015, several supporters of RB Leipzig received letters, indirectly threatening them with violence if they decided to support their team in Karlsruhe.
Sebelum bertandang melawan Karlsruher SC pada 9 Maret 2015, beberapa supporter RB Leipzig menerima surat, secara tidak langsung mengancam dengan kekerasan bila mereka memutuskan untuk mendukung tim mereka di Karlsruhe.