user: Question: Who was the opponent when Raphael was 4-0?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Win', '7-0', 'Joseph Bryant', 'TKO (strikes)', 1.0, '1:04', 'Rio Rancho, New Mexico , United States']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Record" = '4-0';