Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
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?

### Inputs:
table_name: table, columns: ['Athlete', 'Event', 'Round of 64', 'Round of 32', 'Round of 16', 'Quarterfinals']

### Response:
SELECT Round of 64 FROM table WHERE Event = Singles AND Round of 16 = Did not advance AND Athlete = Iveta Benešová