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

### Instruction:
Who did Thomaz Bellucci play against when he became runner-up on a clay surface?

### Inputs:
table_name: table, columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Opponent', 'Score']

### Response:
SELECT Opponent FROM table WHERE Outcome = runner-up AND Surface = clay