CREATE TABLE table_56731 ("Edition" FLOAT, "Zone" TEXT, "Round" TEXT, "Date" TEXT, "Against" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents" TEXT, "Result" TEXT)

Who was against the opponents, m d lina gojnea monica niculescu?
SELECT "Against" FROM table_56731 WHERE "Opponents" = 'mădălina gojnea monica niculescu'
SELECT "Against" FROM "table_56731" WHERE "Opponents" = 'mădălina gojnea monica niculescu'