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

### Instruction:
What surface was played on against Shahar Pe'er?

### Inputs:
table_name: table, columns: ['Edition', 'Zone', 'Round', 'Date', 'Against', 'Surface', 'Opponent', 'Outcome', 'Result']

### Response:
SELECT Surface FROM table WHERE Opponent = shahar pe'er