What Championship has Scores of 6–3, 2–6, 3–6, 6–3, 3–6?
CREATE TABLE "runner_ups_5" (
  "year" real,
  "championship" text,
  "partner" text,
  "opponents" text,
  "score" text
);
SELECT "championship" FROM "runner_ups_5" WHERE "score"='6–3, 2–6, 3–6, 6–3, 3–6';