What is the Outcome of the match with a Score of 6–3, 6–4?
CREATE TABLE "singles_10_7_3" (
  "outcome" text,
  "date" text,
  "tournament" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score" text
);
SELECT "outcome" FROM "singles_10_7_3" WHERE "score"='6–3, 6–4';