Question: Which zone had Mădălina Gojnea Monica Niculescu as the opponent?
SQL: SELECT "Zone" FROM "2-11326124-4" WHERE "Opponents" = 'Mădălina Gojnea Monica Niculescu';

Question: Who was against the opponents, Mădălina Gojnea Monica Niculescu?
SQL: SELECT "Against" FROM "2-11326124-4" WHERE "Opponents" = 'Mădălina Gojnea Monica Niculescu';

Question: What was the surface on the game with Margit Rüütel Anett Schutting as the opponent?
SQL: SELECT "Surface" FROM "2-11326124-4" WHERE "Opponents" = 'Margit Rüütel Anett Schutting';

Question: What is the zone of the game played against Estonia?
SQL: SELECT "Zone" FROM "2-11326124-4" WHERE "Against" = 'Estonia';