Which date has a Score of 4–6, 2–6?
CREATE TABLE "singles_6_4_titles_2_runners_up" (
  "outcome" text,
  "date" text,
  "surface" text,
  "opponent" text,
  "score" text
);
SELECT "date" FROM "singles_6_4_titles_2_runners_up" WHERE "score"='4–6, 2–6';