On what surface was the game played that had a score of 4–6, 6–4, [8–10]?
CREATE TABLE "doubles_13_9_titles_4_runners_up" (
  "outcome" text,
  "year" text,
  "championship" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);
SELECT "surface" FROM "doubles_13_9_titles_4_runners_up" WHERE "score"='4–6, 6–4, [8–10]';