user: Question: Who was the opponent of the match in round SF with a result of 0-0?
Columns: ['Date', 'Round', 'Opponent', 'Venue', 'Result', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['14 September 2004', 'GS', 'Paris Saint-Germain', 'A', '3-0', 40000.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Round" = 'SF' AND "Result" = '0-0';