user: Question: On what surface was Ivan Lendl a partner with a Runner-up outcome and final score of 2–6, 6–7?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Partner', 'Opponents in the final', 'Score in the final']
Types: ['text', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Winner', 1981.0, 'Bologna , Italy', 'Carpet', 'Sammy Giammalva Jr.', 'Tomáš Šmíd Balázs Taróczy', '7–6, 6–4']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Outcome" = 'Runner-up' AND "Partner" = 'Ivan Lendl' AND "Score in the final" = '2–6, 6–7';