Played on Clay Surface, what was the Score of the Dortmund Tournament?
CREATE TABLE "doubles_8" (
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponents_in_the_final" text,
  "score_in_the_final" text
);
SELECT "score_in_the_final" FROM "doubles_8" WHERE "surface"='clay' AND "tournament"='dortmund';