CREATE TABLE table_name_17 (surface VARCHAR, score VARCHAR)

What was the Surface when the Score was 6 4, 2 6, 3 6?
SELECT surface FROM table_name_17 WHERE score = "6–4, 2–6, 3–6"
SELECT "surface" FROM "table_name_17" WHERE "6–4, 2–6, 3–6" = "score"