Judgment of the Court (Eighth Chamber) of 25 February 2021.#Slovak Telekom a.s. v Protimonopolný úrad Slovenskej republiky.#Request for a preliminary ruling from the Najvyšší súd Slovenskej republiky.#Reference for a preliminary ruling – Competition – Article 102 TFEU – Abuse of a dominant position – Division of competences between the European Commission and the national competition authorities – Regulation (EC) No 1/2003 – Article 11(6) – National competition authorities relieved of their competence – Principle ne bis in idem – Article 50 of the Charter of Fundamental Rights of the European Union.#Case C-857/19.