What day did he play on hard with tom mercer?
CREATE TABLE table_name_69 (date VARCHAR, surface VARCHAR, partner VARCHAR)
SELECT date FROM table_name_69 WHERE surface = "hard" AND partner = "tom mercer"
### Context: CREATE TABLE table_name_69 (date VARCHAR, surface VARCHAR, partner VARCHAR) ### Question: What day did he play on hard with tom mercer? ### Answer: SELECT date FROM table_name_69 WHERE surface = "hard" AND partner = "tom mercer"