Judgment of the General Court (Seventh Chamber) of 16 December 2020.#Fakro sp z o.o. v European Commission.#Competition – Abuse of dominant position – Market for roof windows and flashings – Decision rejecting a complaint – Article 7 of Regulation (EC) No 773/2004 – Access to the file – Principle of sound administration – Reasonable period – Manifest error of assessment – Obligation to state reasons – No EU interest – Probability of being able to establish the existence of an infringement – Predatory pricing – ‘Fighting brands’ – Rebates