Who was Silva's Partner in the match with a Score of 6–3, 7–6 (7–3)?
CREATE TABLE "doubles_18" (
  "date" text,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponent_in_the_final" text,
  "score" text
);
SELECT "partner" FROM "doubles_18" WHERE "score"='6–3, 7–6 (7–3)';