CREATE TABLE table_43669 ("Match" TEXT, "Date" TEXT, "Location" TEXT, "Lineup" TEXT, "Result" TEXT, "Competition" TEXT)

Which Match has a Competition of Group Stage on 2000-09-17?
SELECT "Match" FROM table_43669 WHERE "Competition" = 'group stage' AND "Date" = '2000-09-17'
SELECT "Match" FROM "table_43669" WHERE "Competition" = 'group stage' AND "Date" = '2000-09-17'