CREATE TABLE table_name_55 (year INT, sets VARCHAR, aces VARCHAR, opponent VARCHAR)

what's the most recent year that samantha stosur was the opponent with 20 aces and having played more than 2 sets?
SELECT MAX(year) FROM table_name_55 WHERE aces = 20 AND opponent = "samantha stosur" AND sets > 2
SELECT MAX("year") FROM "table_name_55" WHERE "aces" = 20 AND "opponent" = "samantha stosur" AND "sets" > 2