CREATE TABLE table_56672 ("Outcome" CLOB, "Tournament" CLOB, "Surface" CLOB, "Partnering" CLOB, "Score in the final" CLOB)

On what surface was the score in the final 0 6, 4 6?
SELECT "Surface" FROM table_56672 WHERE "Score in the final" = '0–6, 4–6'
SELECT "Surface" FROM "table_56672" WHERE "Score in the final" = '0–6, 4–6'