CREATE TABLE table_4996 ("Date" TEXT, "City" TEXT, "Opponent" TEXT, "Results\\u00b9" TEXT, "Type of game" TEXT)

Which opponent had a result of 0:1?
SELECT "Opponent" FROM table_4996 WHERE "Results\u00b9" = '0:1'
SELECT "Opponent" FROM "table_4996" WHERE "Results\u00b9" = '0:1'