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

### Instruction:
state the number of surface where championship is australian open and score in the final is 6–3, 4–6, 11–9

### Inputs:
table_name: table, columns: ['Outcome', 'Year', 'Championship', 'Surface', 'Partner', 'Opponents in the final', 'Score in the final']

### Response:
SELECT COUNT Surface FROM table WHERE Championship = Australian Open AND Score in the final = 6–3, 4–6, 11–9