On what Surface was the match with a Score of 6 4, 6 3 and Runner-up Outcome played?
CREATE TABLE table_name_30 (
    surface VARCHAR,
    outcome VARCHAR,
    score VARCHAR
)
SELECT surface FROM table_name_30 WHERE outcome = "runner-up" AND score = "6–4, 6–3"
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: On what Surface was the match with a Score of 6 4, 6 3 and Runner-up Outcome played? ### Input: CREATE TABLE table_name_30 (
    surface VARCHAR,
    outcome VARCHAR,
    score VARCHAR
) ### Response: SELECT surface FROM table_name_30 WHERE outcome = "runner-up" AND score = "6–4, 6–3"