user: Question: Who was the opponent when the head coach was B. Sathianathan?
Columns: ['Date', 'Location', 'Head coach', 'Opponent', 'Result']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['29 July 2008', 'Shah Alam Stadium', 'B. Sathianathan', 'Chelsea', '0–2 (L)']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Head coach" = 'B. Sathianathan';