user: Question: Name the Outcome which has a Score in the final of 4–6, 4–6 on October 21, 1990?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Partner', 'Opponents in the final', 'Score in the final']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', 'October 4, 1987', 'San Francisco , USA', 'Carpet (i)', 'Glenn Layendecker', 'Jim Grabb Patrick McEnroe', '2–6, 6–0, 4–6']
SQL:

assistant: SELECT "Outcome" FROM "Table" WHERE "Score in the final" = '4–6, 4–6' AND "Date" = 'October 21, 1990';