As the main body for resolving sports disputes, the Court of Arbitration for Sport issues rulings that have profound effects on global and national sports. However, the enforcement of CAS awards at the national level faces challenges, including conflicts with domestic laws, judicial limitations, and resistance from sports federations. In this study, using a qualitative method, authoritative legal sources, international documents, and judicial procedures have been analysed. The findings show that differences in legal systems, especially in countries with customary and civil law systems, as well as governance issues, make it difficult to enforce decisions This could lead to violations of the principles of sports justice and athletes' rights. The study suggests that new international treaties be developed to make the implementation of the Court of Arbitration for Sport's decisions binding, coordination with national laws be strengthened, and regional sports bodies play a more active role. The International Olympic Committee and world federations should also establish monitoring mechanisms. The need for legal reforms to ensure fair implementation of decisions and protect the rights of athletes has been highlighted. This research contributes to the legal discourse on the balance between the autonomy of sports institutions and national legal requirements