user: Question: Which tournament was Andreas Haider-Maurer the opponent in?
Columns: ['Date', 'Tournament', 'Surface', 'Opponent', 'Score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['23 October 2000', 'Negril', 'Clay', 'Johan Ortegren', '6–3, 6–1']
SQL:

assistant: SELECT "Tournament" FROM "Table" WHERE "Opponent" = 'Andreas Haider-Maurer';