CREATE TABLE table_77749 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

What 1st leg has Alense Vivaldi (Trentino) as Agg.?
SELECT "1st leg" FROM table_77749 WHERE "Agg." = 'alense vivaldi (trentino)'
SELECT "1st leg" FROM "table_77749" WHERE "Agg." = 'alense vivaldi (trentino)'