Name the surface for 6–0, 6–3
CREATE TABLE "singles_26_19_titles_7_runners_up" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score_in_the_final" text
);
SELECT "surface" FROM "singles_26_19_titles_7_runners_up" WHERE "score_in_the_final"='6–0, 6–3';