What opponent has a result of 3–6, 6–2, 4–6?
CREATE TABLE "singles_21_5" (
  "edition" text,
  "round" text,
  "date" text,
  "surface" text,
  "opponent" text,
  "result" text
);
SELECT "opponent" FROM "singles_21_5" WHERE "result"='3–6, 6–2, 4–6';