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"
### Context: CREATE TABLE table_name_90 (surface VARCHAR, score VARCHAR) ### Question: What was the court surface when the score was 6–4, 6–1? ### Answer: SELECT surface FROM table_name_90 WHERE score = "6–4, 6–1"