Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_13399573_3 (points_against VARCHAR, won VARCHAR)
### Question:
What was the number of points against when the amount won is 10?
### Answer:
SELECT points_against FROM table_13399573_3 WHERE won = "10"