Table schema:
CREATE TABLE table_name_22 (opponents_in_final VARCHAR, surface VARCHAR, score_in_final VARCHAR)

Question: Who were the opponents in the final when the game was played on hard surface and the score of the final was 6–1, 1–6, 7–6(4)?
SQL: SELECT opponents_in_final FROM table_name_22 WHERE surface = "hard" AND score_in_final = "6–1, 1–6, 7–6(4)"