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

### Instruction:
If the opponent is Kristian Pless, who was it against?

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

### Response:
SELECT Against FROM table WHERE Opponent = Kristian Pless