CREATE TABLE table_8439 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

The 2nd leg is what for the Atl tico Madrid as Team 1?
SELECT "2nd leg" FROM table_8439 WHERE "Team 1" = 'atlético madrid'
SELECT "2nd leg" FROM "table_8439" WHERE "Team 1" = 'atlético madrid'