On what surface was the game played with a score of  6–4, 6–4?
CREATE TABLE table_177273_2 (surface VARCHAR, score VARCHAR)
SELECT surface FROM table_177273_2 WHERE score = "6–4, 6–4"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: 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? [/INST] SELECT surface FROM table_177273_2 WHERE score = "6–4, 6–4" </s>