This article discusses the implications of the rule of law crisis on a core area ofEUlaw: competition law. It analyses the reforms of the judiciary in selected EU Member States and the reaction of EU institutions. The article shows that the reforms of the judiciary give rise to doubts regarding the independence and expertise of courts which are responsible for reviewing the decisions of national competition authorities adopted under Articles 101–102 Treaty on the Functioning of the European Union (TFEU) and national competition laws. As a result, the effective judicial protection required by EU primary law is undermined. In addition, mutual trust, upon which the decentralized enforcement of EU competition law is based, is put into question. The article calls upon EU institutions, and in particular the European Commission, to monitor closely the developments in Member States which may affect the enforcement of EU (and national) competition rules.