CREATE TABLE table_58982 ("Outcome" CLOB, "Date" CLOB, "Championship" CLOB, "Surface" CLOB, "Opponent in the final" CLOB, "Score in the final" CLOB)

What Opponent in the final has a Date of 19 september 1988?
SELECT "Opponent in the final" FROM table_58982 WHERE "Date" = '19 september 1988'
SELECT "Opponent in the final" FROM "table_58982" WHERE "Date" = '19 september 1988'