Leopold Querfeld

Leopold Querfeld is not mentioned in either of the provided news articles. The articles primarily focus on Union Berlin's struggles in the Bundesliga, the appointment of Marie-Louise Eta as the first female Bundesliga coach, and Heidenheim's victory against Union Berlin. Therefore, it's impossible to provide any information about Leopold Querfeld based on the given context. The articles detail Union Berlin's fight against relegation and Heidenheim's efforts to avoid relegation, highlighting key players and tactical approaches, but Querfeld is not part of this narrative.