CREATE TABLE table_55487 ("Outcome" CLOB, "Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

When was andrea g miz the opponent?
SELECT "Date" FROM table_55487 WHERE "Opponent" = 'andrea gámiz'
SELECT "Date" FROM "table_55487" WHERE "Opponent" = 'andrea gámiz'