CREATE TABLE table_23812628_1 (team__number1 VARCHAR)

Name the 2nd leg for boca juniors
SELECT 2 AS nd_leg FROM table_23812628_1 WHERE team__number1 = "Boca Juniors"
SELECT 2 AS "nd_leg" FROM "table_23812628_1" WHERE "Boca Juniors" = "team__number1"