Question: In what edition is Ungur's opponent David Nalbandian?
SQL: SELECT "Edition" FROM "1-24099476-8" WHERE "Opponent" = 'David Nalbandian';

Question: When was the win/Lose Lose and the round a Play-off?
SQL: SELECT "Date" FROM "1-24099476-8" WHERE "Win/Lose" = 'Lose' AND "Round" = 'Play-off';

Question: In what round did he play against Sergiy Stakhovsky?
SQL: SELECT "Round" FROM "1-24099476-8" WHERE "Opponent" = 'Sergiy Stakhovsky';