What was the surface for the  opponents in the final with fitzgerald vilas?
CREATE TABLE "legends_over_45_doubles" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "partner" text,
  "opponents_in_the_final" text,
  "score_in_the_final" text
);
SELECT "surface" FROM "legends_over_45_doubles" WHERE "opponents_in_the_final"='Fitzgerald Vilas';