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

### Instruction:
Name the surfaace where outcome is runner-up and championship is us open

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

### Response:
SELECT Surface FROM table WHERE Outcome = Runner-up AND Championship = US Open