What person was played against when the playing surface was hard?
CREATE TABLE table_name_42 (opponent VARCHAR, surface VARCHAR)
SELECT opponent FROM table_name_42 WHERE surface = "hard"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_42 (opponent VARCHAR, surface VARCHAR) Question: What person was played against when the playing surface was hard? [/INST] SELECT opponent FROM table_name_42 WHERE surface = "hard" </s>