user: Question: What was the Surface when the Score was 6–4, 2–6, 3–6?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Opponent in the final', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', '27 July 2003', 'Puerto Ordaz', 'Hard', 'Zuzana Cerna', '0–6, 0–6']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Score" = '6–4, 2–6, 3–6';