user: Question: Which surfaces have the final score of 6–1, 6–7 (2–7) , 7–6 (7–5) , 7–6 (10–8)?
Columns: ['Outcome', 'Year', 'Championship', 'Surface', 'Opponent in the final', 'Score in the final']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', 1991.0, 'Cincinnati', 'Hard', 'Guy Forget', '6–2, 6–7 (4–7) , 4–6']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Score in the final" = '6–1, 6–7 (2–7) , 7–6 (7–5) , 7–6 (10–8)';