Case C-447/18: Judgment of the Court (Third Chamber) of 18 December 2019 (request for a preliminary ruling from the Najvyšší súd Slovenskej republiky — Slovak Republic) — UB v Generálny riaditeľ Sociálnej poisťovne Bratislava (Reference for a preliminary ruling — Social security — Coordination of social security systems — Regulation (EC) No 883/2004 — Article 3 — Matters covered — Old-age benefit — Freedom of movement for workers within the European Union — Regulation (EU) No 492/2011 — Article 7 — Equal treatment of national workers and migrant workers — Social advantages — Legislation of a Member State restricting the grant of an ‘additional benefit for sportspersons who have represented the State’ to the citizens of that State)