Which tournament has an opponent in the final of nadia petrova and a score of 6–3, 4–6, 6–1??
CREATE TABLE "runner_up_16" (
  "date" text,
  "tournament" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score" text
);
SELECT "tournament" FROM "runner_up_16" WHERE "opponent_in_the_final"='nadia petrova' AND "score"='6–3, 4–6, 6–1';