The book is an introduction to sports law, in particular International (worldwide) and European (EU) sports law. The chapters are all put in the perspective of the innovative sports law doctrine that is developed and presented in the opening chapter on what sports law is. After a general coverage of the core concept of 'sport specificity' (that is whether private sporting rules and regulations can be justified notwithstanding they are not in conformity with public law), the book covers the following specific main themes of International and European Sports Law (capita selecta): comparative sports law; competition law and sport; the collective selling of TV rights; sports betting; Social Dialogue in sport; sport and nationality; professional football transfer rules; anti-doping law in sport; transnational football hooliganism in Europe; international sports boycotts. In this book association football ('soccer') is the sport that is by far most on the agenda. It is the largest sport in the world and most popular all over the globe. The elite football in Europe is a day-to-day commercialized and professionalized industry, which makes it a perfect subject of study from an EU Law perspective.