Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_45729 ( "Outcome" text, "Date" text, "Tournament" text, "Surface" text, "Partner" text, "Opponents in the final" text, "Score in the final" text )

### Question ###
Name the Outcome which has a Score in the final of 4 6, 4 6 on october 21, 1990?

### Accurate SQL ###

SELECT "Outcome" FROM table_45729 WHERE "Score in the final" = '4–6, 4–6' AND "Date" = 'october 21, 1990'