What is the Championship with Vitas Gerulaitis as Opponent in the final in a match on Clay Surface?
CREATE TABLE "singles_titles_2" (
  "outcome" text,
  "date" real,
  "championship" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score_in_the_final" text
);
SELECT "championship" FROM "singles_titles_2" WHERE "surface"='clay' AND "opponent_in_the_final"='vitas gerulaitis';