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_177273_2 (surface VARCHAR, score VARCHAR)
### Question:
On what surface was the game played with a score of  6–4, 6–4?
### Answer:
SELECT surface FROM table_177273_2 WHERE score = "6–4, 6–4"