CREATE TABLE "doubles_titles_4" (
  "date" text,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponents_in_the_final" text,
  "score" text
);

Question: What is the surface when the partner was Robert Haybittel?
SQL: SELECT "surface" FROM "doubles_titles_4" WHERE "partner"='robert haybittel';