What day was the score for tournament of alcobaça 6–3, 2–6, 7–5?
CREATE TABLE "singles_12" (
  "date" text,
  "tournament" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score" text
);
SELECT "date" FROM "singles_12" WHERE "tournament"='alcobaça' AND "score"='6–3, 2–6, 7–5';