CREATE TABLE table_25824 ("Outcome" TEXT, "Year" FLOAT, "Championship" TEXT, "Surface" TEXT, "Opponent in the final" TEXT, "Score in the final" TEXT)

On what year did Newcombe first face Clark Graebner in a final match?
SELECT MIN("Year") FROM table_25824 WHERE "Opponent in the final" = 'Clark Graebner'
SELECT MIN("Year") FROM "table_25824" WHERE "Opponent in the final" = 'Clark Graebner'