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

### Instruction:
How many weeks are shown for the champion of john mcenroe 6–2, 6–3?

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

### Response:
SELECT COUNT Week of FROM table WHERE Champion = John McEnroe 6–2, 6–3