Judgment of the Court (Second Chamber) of 10 December 2020.#Comune di Milano v European Commission.#Appeal – State aid – Air transport sector – Ground handling services at Milan-Linate and Milan-Malpensa airports (Italy) – Injections of capital by the company managing those airports into its wholly owned subsidiary providing those services – Public ownership of the managing company – Decision declaring those State aid measures unlawful and incompatible with the internal market – Article 107(1) TFEU – Concepts of ‘State resources’, ‘measure imputable to the State’ and ‘economic advantage’ – Private operator principle – Private investor test – Burden of proof – Complex economic assessments – Intensity of judicial review – Distortion of evidence.#Case C-160/19 P.