Name the surface for score of 7 6(4), 6 1
CREATE TABLE table_52581 (
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Opponent in the final" text,
    "Score" text
)
SELECT "Surface" FROM table_52581 WHERE "Score" = '7–6(4), 6–1'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Name the surface for score of 7 6(4), 6 1 ### Input: CREATE TABLE table_52581 (
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Opponent in the final" text,
    "Score" text
) ### Response: SELECT "Surface" FROM table_52581 WHERE "Score" = '7–6(4), 6–1'