How many different results were there for the scores 6–7 (2–7) , 6–2, 7–6 (7–3)?
CREATE TABLE "singles_21_10_titles_11_runners_up" (
  "result" text,
  "no" real,
  "date" text,
  "category" text,
  "tournament" text,
  "surface" text,
  "opponent" text,
  "score" text
);
SELECT COUNT("result") FROM "singles_21_10_titles_11_runners_up" WHERE "score"='6–7 (2–7) , 6–2, 7–6 (7–3)';