On what Date was the Score of 3–6, 6–4, 3–6, 6–1, 6–2
CREATE TABLE "singles_18_8_titles_10_runner_ups" (
  "outcome" text,
  "date" real,
  "championship" text,
  "surface" text,
  "opponent" text,
  "score" text
);
SELECT SUM("date") FROM "singles_18_8_titles_10_runner_ups" WHERE "score"='3–6, 6–4, 3–6, 6–1, 6–2';