CREATE TABLE table_38890 ("Date" TEXT, "City" TEXT, "Opponent" TEXT, "Results\\u00b9" TEXT, "Type of game" TEXT)

Who was the opponent at the game in Belgrade with a 0:2 result?
SELECT "Opponent" FROM table_38890 WHERE "City" = 'belgrade' AND "Results\u00b9" = '0:2'
SELECT "Opponent" FROM "table_38890" WHERE "City" = 'belgrade' AND "Results\u00b9" = '0:2'