Christian Romberg is a German FIFA football agent and managing director of 25 ELEVEN GmbH, a Munich-based football representation and management company. His profile is most closely associated with long-term work around Thomas Müller, one of the most accomplished German footballers of his generation. Romberg’s background combines player representation, marketing, social media, commercial coordination and athlete brand management. Before his current role with 25 ELEVEN, he was connected for many years to the advisory structure around Müller and Kögl & Partner, where his work included marketing, partner communication and public-facing coordination. That experience gives his profile a broader sports-business focus than traditional transfer-only representation. Through 25 ELEVEN, Romberg works within a selective agency platform connected to senior professionals and emerging players in the German football market. His representation profile reflects a modern European agent model built around contract guidance, personal brand development, commercial relationships, media positioning and long-term player support. His work is especially tied to managing the full professional ecosystem around elite players, including sporting decisions, public image, sponsorship activity and career planning beyond the pitch.