CREATE TABLE table_68760 ("Outcome" TEXT, "Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

Which tournament has a Date of april 20, 1987?
SELECT "Tournament" FROM table_68760 WHERE "Date" = 'april 20, 1987'
SELECT "Tournament" FROM "table_68760" WHERE "Date" = 'april 20, 1987'