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

### Instruction:
What is the total of events when the tournament was U.S. Open and the Top-25 was less than 1?

### Inputs:
table_name: table, columns: ['Tournament', 'Wins', 'Top-10', 'Top-25', 'Events', 'Cuts made']

### Response:
SELECT SUM Events FROM table WHERE Tournament = u.s. open AND Top-25 < 1