What surface did hayley ericksen play on?
CREATE TABLE "doubles_finals_6_2" (
  "outcome" text,
  "date" text,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponents_in_the_final" text,
  "score" text
);
SELECT "surface" FROM "doubles_finals_6_2" WHERE "partner"='hayley ericksen';