CREATE TABLE table_25944 ("Outcome" TEXT, "Year" FLOAT, "Championship" TEXT, "Surface" TEXT, "Opponent in the final" TEXT, "Score in the final" TEXT)

What is the surface for the year 2001?
SELECT "Surface" FROM table_25944 WHERE "Year" = '2001'
SELECT "Surface" FROM "table_25944" WHERE "Year" = '2001'