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_84 (opponents VARCHAR, surface VARCHAR, outcome VARCHAR)
### Question:
Who were the opponents in the match that was played on a hard court and had a runner-up outcome?
### Answer:
SELECT opponents FROM table_name_84 WHERE surface = "hard" AND outcome = "runner-up"