CREATE TABLE table_61797 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

What is team 1 when team 2 is Manchester United?
SELECT "Team 1" FROM table_61797 WHERE "Team 2" = 'manchester united'
SELECT "Team 1" FROM "table_61797" WHERE "Team 2" = 'manchester united'