CREATE TABLE table_203_442 (id DECIMAL, "#" DECIMAL, "date" TEXT, "venue" TEXT, "opponent" TEXT, "score" TEXT, "result" TEXT, "competition" TEXT)

which opponent team had the most wins ?
SELECT "opponent" FROM table_203_442 GROUP BY "opponent" ORDER BY COUNT("score" > "score") DESC LIMIT 1
SELECT "opponent" FROM "table_203_442" GROUP BY "opponent" ORDER BY COUNT("score" > "score") DESC NULLS LAST LIMIT 1