Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_17289604_38 (round_of_64 VARCHAR, athlete VARCHAR, event VARCHAR, round_of_16 VARCHAR)

### Question ###
What was round of 64 of the singles event when the result of round 16 was did not advance and the athlete was Iveta Benešová?

### Accurate SQL ###

SELECT round_of_64 FROM table_17289604_38 WHERE event = "Singles" AND round_of_16 = "Did not advance" AND athlete = "Iveta Benešová"