Table schema:
CREATE TABLE table_name_66 (surface VARCHAR, score_in_the_final VARCHAR, outcome VARCHAR, partner VARCHAR)

Question: On what surface was Ivan Lendl a partner with a runner-up outcome and final score of 2–6, 6–7?
SQL: SELECT surface FROM table_name_66 WHERE outcome = "runner-up" AND partner = "ivan lendl" AND score_in_the_final = "2–6, 6–7"