CREATE TABLE table_name_70 (set_3 VARCHAR, set_2 VARCHAR, set_1 VARCHAR)

What is the Set 3 when the Set 2 is 21 25, and a Set 1 is 25 21?
SELECT set_3 FROM table_name_70 WHERE set_2 = "21–25" AND set_1 = "25–21"
SELECT "set_3" FROM "table_name_70" WHERE "21–25" = "set_2" AND "25–21" = "set_1"