CREATE TABLE "doubles_18" (
  "date" text,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponent_in_the_final" text,
  "score" text
);

Question: Who was Silva's Partner in the Amarante Tournament played on a Hard Surface?
SQL: SELECT "partner" FROM "doubles_18" WHERE "surface"='hard' AND "tournament"='amarante';

Question: Who was Silva's Partner in the match with a Score of 6–3, 7–6 (7–3)?
SQL: SELECT "partner" FROM "doubles_18" WHERE "score"='6–3, 7–6 (7–3)';

Question: On what Date was the match with partner Kira Nagy?
SQL: SELECT "date" FROM "doubles_18" WHERE "partner"='kira nagy';

Question: What is the Date of the Vigo Tournament?
SQL: SELECT "date" FROM "doubles_18" WHERE "tournament"='vigo';

Question: What Tournament did Silva Partner with Nicole Thijssen with Opponent in the final Nina Bratchikova & Frederica Piedade?
SQL: SELECT "tournament" FROM "doubles_18" WHERE "partner"='nicole thijssen' AND "opponent_in_the_final"='nina bratchikova & frederica piedade';