CREATE TABLE table_204_441 (id DECIMAL, "date" TEXT, "opponent" TEXT, "venue" TEXT, "result" TEXT, "attendance" DECIMAL, "scorers" TEXT)

what was the first opponent oxford united f.c. defeated during the season ?
SELECT "opponent" FROM table_204_441 WHERE "result" > "result" ORDER BY "date" LIMIT 1
SELECT "opponent" FROM "table_204_441" WHERE "result" > "result" ORDER BY "date" NULLS FIRST LIMIT 1