CREATE TABLE table_27719 ("Edition" FLOAT, "Zone" TEXT, "Round" TEXT, "Against" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents" TEXT, "Outcome" TEXT, "Result" TEXT)

in what round types did the opponent come from south africa?
SELECT "Round" FROM table_27719 WHERE "Against" = 'South Africa'
SELECT "Round" FROM "table_27719" WHERE "Against" = 'South Africa'