CREATE TABLE "doubles_17" (
  "edition" text,
  "round" text,
  "date" text,
  "partnering" text,
  "against" text,
  "surface" text,
  "opponents" text,
  "result" text
);

Question: For what round was the opponent nikola ćirić dušan vemić?
SQL: SELECT "round" FROM "doubles_17" WHERE "opponents"='nikola ćirić dušan vemić';

Question: What was the surface when the result was 6–7 (6–7) , 7–6 (9–7) , 6–7 (4–7) , 7–5, 3–6?
SQL: SELECT "surface" FROM "doubles_17" WHERE "result"='6–7 (6–7) , 7–6 (9–7) , 6–7 (4–7) , 7–5, 3–6';