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

### Instruction:
In the week of what was the runner-up Pat Du Pré?

### Inputs:
table_name: table, columns: ['Week of', 'Tournament', 'Champion', 'Runner-up', 'Semifinalists', 'Quarterfinalists']

### Response:
SELECT Week of FROM table WHERE Runner-up = Pat Du Pré