CREATE TABLE "doubles_6_3_titles_3_runners_up" (
  "outcome" text,
  "date" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);

Question: Who was the partner that played a match on a grass court?
SQL: SELECT "partner" FROM "doubles_6_3_titles_3_runners_up" WHERE "surface"='grass';

Question: What was the score of the match in which mardy fish was the partner?
SQL: SELECT "score" FROM "doubles_6_3_titles_3_runners_up" WHERE "partner"='mardy fish';

Question: Who were the opponents in the match that was played on a hard court and had a runner-up outcome?
SQL: SELECT "opponents" FROM "doubles_6_3_titles_3_runners_up" WHERE "surface"='hard' AND "outcome"='runner-up';