William Chiu
| Division | 18 |
| Home Town | San Diego, CA |
| USTA Section | Southern California (SCTA) |
| Singles Line | 254 |
| Singles Seed | 0 |
| Doubles Line | 118 |
| Doubles Seed | 0 |
2013
Boys 18 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Andrew Harrington / Shane Monroe def. William Chiu / Jake Douglas | 7-6(5), 6-7(2), 1-0(6) |
Boys 18 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Hayden Sabatka def. William Chiu | 7-5, 6-1 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Terrance Whitehurst def. William Chiu | 6-2, 6-3 |
2012
Boys 16 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | William Chiu / Sam Edwards def. Sam Hoogland / Aaron Sandberg | Def(ns) |
| 2nd Rd | William Chiu / Sam Edwards def. Chase Colton / Kyle Seelig (15) | 6-4, 7-6(5) |
| 3rd Rd | Will Baird / Korey Lovett def. William Chiu / Sam Edwards | 6-2, 6-3 |
Boys 16 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Cody Rakela def. William Chiu (25) | 6-3, 6-1 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 2nd Rd | William Chiu (25) def. Danny Coran | 6-1, 6-3 |
| 3rd Rd Qualifying | William Chiu (25) def. Jake Gober | 6-2, 6-2 |
| 3rd Rd | William Chiu (25) def. Tommy Paul | 7-6(6), 6-2 |
| 4th Rd Qualifying | William Chiu (25) def. Martin Joyce | 7-6(5), 7-6(4) |
| 4th Rd | William Little def. William Chiu (25) | 6-2, 6-4 |
2011
Boys 16 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | William Chiu def. Elliott Sprecher | 6-2, 6-4 |
| 3rd Rd | Robbie Bellamy (21) def. William Chiu | 6-4, 5-7, 6-1 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 3rd Rd | Marshall Sharp def. William Chiu | 6-4, 6-2 |
Boys 16 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | William Chiu / Logan Smith def. Trevor Johnson / David Mitchell | 7-5, 7-5 |
| 2nd Rd | William Chiu / Logan Smith def. Jake Albo / Trey Daniel (15) | 7-6(4), 3-6, 1-0(1) |
| 3rd Rd | Conrad Harron / Samuel Shropshire def. William Chiu / Logan Smith | 6-3, 6-0 |