CREATE TABLE table_6668 ("Season" CLOB, "Competition" CLOB, "Round" CLOB, "Club" CLOB, "Score" CLOB)

Which club has a 2nd round score of 1:0, 3:0?
SELECT "Club" FROM table_6668 WHERE "Round" = '2nd round' AND "Score" = '1:0, 3:0'
SELECT "Club" FROM "table_6668" WHERE "Round" = '2nd round' AND "Score" = '1:0, 3:0'