What is the date of the tournament with carlos moyà as the opponent?
CREATE TABLE "singles_21_10_titles_11_runner_ups" (
  "outcome" text,
  "date" text,
  "tournament" text,
  "surface" text,
  "opponent" text,
  "score" text
);
SELECT "date" FROM "singles_21_10_titles_11_runner_ups" WHERE "opponent"='carlos moyà';