user: ### NOW ANSWER:
Question: Which match did FCR 2001 Duisburg participate as the opponent?
Columns: ['Match', 'Date', 'Opponent', 'Venue', 'Result', 'Attnd.', 'Report']
Types: ['real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [1.0, '7 September 2008', 'Bayern Munich', 'H', '0:3 (0:2)', 1279.0, 'Report']
SQL:

assistant: SELECT SUM("Match") FROM "Table" WHERE "Opponent" = 'FCR 2001 Duisburg';