Book excerpt: This is the first book to investigate the significance of Brexit for sport, with a particular focus on the regulatory and legal challenges that it poses, and the economic and political stresses that are likely to follow in its wake. Written by a team of leading researchers working across sport studies, legal studies and political science, and edited by an EU official with nearly two decades of experience working in EU sport policy, the book explains why regulation, and European dis-integration, matter to sport. It examines key topics including free movement, state aid and labour law, and considers the interests of key stakeholders from fans to football clubs to governing bodies. This is an essential reference for any advanced student, researcher, policy maker, administrator or industry professional working in sport, international law, political science, or international business and management.