This paper examines the Court of Justice of the European Union’s (CJEU’s) landmark ruling in Royale Football Club Seraing (RFC) v. Fédération Internationale de Football Association (FIFA), which recalibrates the relationship between international sports arbitration and the EU constitutional framework. The case, arising from FIFA’s prohibition on third-party ownership (TPO) of football players and subsequent disciplinary sanctions against Belgian club RFC Seraing, tests the boundaries between arbitral autonomy under the New York Convention (NYC) and the Union’s guarantees of judicial protection, competition, and economic freedom. Situating RFC Seraing within the CJEU’s broader arbitration jurisprudence – particularly Eco Swiss, Achmea, Nordsee, and International Skating Union – the paper argues that the Court consolidates a ‘conditional recognition model’, whereby arbitral awards engaging EU law acquire legal effect only after potential judicial review by a court competent to refer questions under Article 267 TFEU. This model affirms the enforceability of Court of Arbitration for Sport (CAS) awards while subjecting them to EU public policy scrutiny. The decision strengthens procedural safeguards and the primacy of Union values, yet exposes structural tensions between EU constitutionalism and the global uniformity of arbitral enforcement.