user: Question: What was the surface when the result was 6–7 (6–7) , 7–6 (9–7) , 6–7 (4–7) , 7–5, 3–6?
Columns: ['Edition', 'Round', 'Date', 'Partnering', 'Against', 'Surface', 'Opponents', 'Result']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2004 Davis Cup Europe/Africa Group II', '1R', '9–11 April 2004', 'Leonardo Tavares', 'Tunisia', 'Hard', 'Haithem Abid Malek Jaziri', '7–5, 6–3, 6–2']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Result" = '6–7 (6–7) , 7–6 (9–7) , 6–7 (4–7) , 7–5, 3–6';