CREATE TABLE table_name_84 (home__2nd_leg_ VARCHAR2)

What was the 2nd leg score when atl tico tucum n played at home?
SELECT 2 AS nd_leg FROM table_name_84 WHERE home__2nd_leg_ = "atlético tucumán"
SELECT 2 AS "nd_leg" FROM "table_name_84" WHERE "atlético tucumán" = "home__2nd_leg_"