Judgment of the Court (Tenth Chamber) of 5 September 2019.#Lombardi Srl v Comune di Auletta and Others.#Request for a preliminary ruling from the Consiglio di Stato.#Reference for a preliminary ruling — Review procedures on the award of public supply and public works contracts — Directive 89/665/EEC — Action for annulment of the decision awarding a public contract by a tenderer whose bid was unsuccessful — Counterclaim brought by the successful tenderer — Admissibility of the main action in the event that the counterclaim is well founded.#Case C-333/18.