Judgment of the Court (Ninth Chamber) of 4 October 2024.#Koninklijke Nederlandse Lawn Tennisbond v Autoriteit Persoonsgegevens.#Request for a preliminary ruling from the Rechtbank Amsterdam.#Reference for a preliminary ruling – Protection of natural persons with regard to the processing of personal data – Regulation (EU) 2016/679 – Article 5(1)(a) – Lawfulness of processing – Point (f) of the first subparagraph of Article 6(1) – Necessity of processing for the purposes of the legitimate interests pursued by the controller or by a third party – Concept of ‘legitimate interests’ – Commercial interest – Sports federation – Disclosure, for consideration, of the personal data of the members of a sports federation to sponsors without the consent of those members.#Case C-621/22.