Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_18 (opponent VARCHAR, partnering VARCHAR, surface VARCHAR, outcome VARCHAR)
### Question:
Who was the Opponent partnering with Jordan Kerr, on a hard surface that was the winner?
### Answer:
SELECT opponent FROM table_name_18 WHERE surface = "hard" AND outcome = "winner" AND partnering = "jordan kerr"