CREATE TABLE table_71400 ("Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Tier" TEXT, "Partner" TEXT, "Opponents in the final" TEXT, "Score" TEXT)

Which date has opponents, Akgul Amanmuradova Nina Bratchikova, in the final?
SELECT "Date" FROM table_71400 WHERE "Opponents in the final" = 'akgul amanmuradova nina bratchikova'
SELECT "Date" FROM "table_71400" WHERE "Opponents in the final" = 'akgul amanmuradova nina bratchikova'