What was the court surface when the score was 6–4, 6–1?
CREATE TABLE table_name_90 (surface VARCHAR, score VARCHAR)
SELECT surface FROM table_name_90 WHERE score = "6–4, 6–1"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_90 (surface VARCHAR, score VARCHAR) Question: What was the court surface when the score was 6–4, 6–1? [/INST] SELECT surface FROM table_name_90 WHERE score = "6–4, 6–1" </s>