Case C-362/19 P: Judgment of the Court (Fifth Chamber) of 4 March 2021 — European Commission v Fútbol Club Barcelona, Kingdom of Spain (Appeal — State aid — Aid granted to certain professional football clubs — Article 107(1) TFEU — Concept of ‘advantage’ — Aid scheme — Regulation (EU) 2015/1589 — Article 1(d) — Reduced tax rate — Non-profit entities — Less advantageous tax deduction — Effect — Cross-appeal — Articles 169 and 178 of the Rules of Procedure of the Court of Justice)