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_55 (date VARCHAR, surface VARCHAR, opponent VARCHAR)
### Question:
What date was the match on a clay surface against Andrea Hlaváčková?
### Answer:
SELECT date FROM table_name_55 WHERE surface = "clay" AND opponent = "andrea hlaváčková"