Which Score in the final has an Outcome of winner, and a Surface of hard (i)?
CREATE TABLE "doubles_15_9_6" (
  "outcome" text,
  "date" real,
  "surface" text,
  "partner" text,
  "opponents_in_the_final" text,
  "score_in_the_final" text
);
SELECT "score_in_the_final" FROM "doubles_15_9_6" WHERE "outcome"='winner' AND "surface"='hard (i)';