On what surface was Ivan Lendl a partner with a runner-up outcome and final score of 2–6, 6–7?
CREATE TABLE "doubles_finals_19_10_9" (
  "outcome" text,
  "date" real,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponents_in_the_final" text,
  "score_in_the_final" text
);
SELECT "surface" FROM "doubles_finals_19_10_9" WHERE "outcome"='runner-up' AND "partner"='ivan lendl' AND "score_in_the_final"='2–6, 6–7';