What was the Opponent on the game played on a Hard Surface with a Score of 3–6, 6–3, [7–10]?
CREATE TABLE "doubles_15_10_5" (
  "outcome" text,
  "date" text,
  "surface" text,
  "partner" text,
  "opponent_in_the_final" text,
  "score" text
);
SELECT "opponent_in_the_final" FROM "doubles_15_10_5" WHERE "surface"='hard' AND "score"='3–6, 6–3, [7–10]';