human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Outcome, Year, Championship, Surface, Opponent in the final, Score in the final
###Question: What is every surface with a score in the final of 6–4, 6–7 (1–7) , 6–7 (4–7) , 4–6?
gpt
SELECT Surface FROM table WHERE Score in the final = 6–4, 6–7 (1–7) , 6–7 (4–7) , 4–6