CREATE TABLE table_73921 ("Outcome" TEXT, "No." TEXT, "Date" TEXT, "Championship" TEXT, "Surface" TEXT, "Opponent in the final" TEXT, "Score in the final" TEXT)

The score in the final is 2 6, 6 2, 6 0, on what surface?
SELECT "Surface" FROM table_73921 WHERE "Score in the final" = '2–6, 6–2, 6–0'
SELECT "Surface" FROM "table_73921" WHERE "Score in the final" = '2–6, 6–2, 6–0'