How many matched scored 3–6, 7–6(5), 6–3?
CREATE TABLE "mixed_doubles_6_3_titles_3_runner_ups" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);
SELECT COUNT("surface") FROM "mixed_doubles_6_3_titles_3_runner_ups" WHERE "score"='3–6, 7–6(5), 6–3';