Antonios Tzanakopoulos acted for the Republic of Cyprus in the International Court of Justice. Cyprus submitted both written and oral pleadings in the Advisory Opinion on the Legal Consequences of the Separation of the Chagos Archipelago from Mauritius in 1965. The oral hearings took place at the seat of the Court, the Peace Palace in The Hague, in September 2018. The Court's opinion is expected in 2019.