This study describes the efforts of the Surabaya City Regional House of Representatives (DPRD Kota Surabaya) in supporting the Surabaya–Liverpool Sister City cooperation for the development of young football talents within the framework of sport diplomacy. This cooperation utilizes sport as a diplomatic instrument to strengthen international relations between cities while simultaneously promoting local human resource development. The research employs a qualitative descriptive approach, using interviews, observation, and document analysis as data collection techniques. The findings indicate that the efforts of DPRD Kota Surabaya through its legislative, budgeting, and oversight functions play a crucial role in ensuring the sustainability and effectiveness of the Sister City cooperation, particularly in the program that sent ten young football players from Surabaya to Liverpool for professional training at the Tranmere Rovers FC Academy. The program has had a positive impact on the technical, mental, and professional development of the participants and has opened pathways to national-level football careers. This study concludes that sport diplomacy at the local government level, supported by strong institutional commitment from the DPRD, can generate dual benefits by strengthening international city-to-city relations and fostering the development of local sports talent.