Who were the opponent in the match on a clay surface that had a score of 6–3, 7–6 (11–9)?
CREATE TABLE "doubles_23_11_12" (
  "outcome" text,
  "date" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);
SELECT "opponents" FROM "doubles_23_11_12" WHERE "surface"='clay' AND "score"='6–3, 7–6 (11–9)';