CREATE TABLE table_55262 ("Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Opponent in the final" TEXT, "Score" TEXT)

What was the court surface when the score was 6 4, 6 1?
SELECT "Surface" FROM table_55262 WHERE "Score" = '6–4, 6–1'
SELECT "Surface" FROM "table_55262" WHERE "Score" = '6–4, 6–1'