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

### Instruction:
Which Round has a Ranking of 2008 wta tour?

### Inputs:
table_name: table, columns: ['Player', 'Ranking', 'Event', 'Surface', 'Round', 'Score']

### Response:
SELECT Round FROM table WHERE Ranking = 2008 wta tour