On which date is the tournament final with the opponents michael berrer & kenneth carlsen?
CREATE TABLE "doubles_titles_5" (
  "date" text,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponents_in_the_final" text,
  "score" text
);
SELECT "date" FROM "doubles_titles_5" WHERE "opponents_in_the_final"='michael berrer & kenneth carlsen';