Who were the opponents of the final on June 23, 2003?
CREATE TABLE "doubles_12" (
  "date" text,
  "tournament" text,
  "surface" text,
  "partnering" text,
  "opponents_in_the_final" text,
  "score" text
);
SELECT "opponents_in_the_final" FROM "doubles_12" WHERE "date"='june 23, 2003';