What date has an outcome of runner-up, and a Score of 6–4, 6–2, and a Opponents of gisela dulko flavia pennetta?
CREATE TABLE "doubles_26_16_10" (
  "outcome" text,
  "date" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);
SELECT "date" FROM "doubles_26_16_10" WHERE "outcome"='runner-up' AND "score"='6–4, 6–2' AND "opponents"='gisela dulko flavia pennetta';