user: Question: Who was the Opponent partnering with Jordan Kerr, on a Hard surface that was the Winner?
Columns: ['Outcome', 'Date', 'Surface', 'Partnering', 'Opponent', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', '26 September 2005', 'Hard', 'Ashley Fisher', 'Lars Burgsmüller Philipp Kohlschreiber', '6–5 (7–3) , 4–6, 2–6']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Surface" = 'Hard' AND "Outcome" = 'Winner' AND "Partnering" = 'Jordan Kerr';