SELECT "Surface" FROM table_6330 WHERE "Score" = '3-6, 1-6'
On what Surface was the match with a Score of 3-6, 1-6 played?
CREATE TABLE table_6330 (
    "Outcome" text,
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Partner" text,
    "Opponents" text,
    "Score" text
)