William Clark
| Division | 18 |
| Home Town | Alexandria, VA |
| USTA Section | Mid-Atlantic (MATA) |
| Singles Line | 165 |
| Singles Seed | 0 |
| Doubles Line | 62 |
| Doubles Seed | 0 |
2018
Boys 18 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Huntley Allen def. William Clark | 5-7, 6-2, 6-3 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Richter Jordaan def. William Clark | 6-3, 6-0 |
Boys 18 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Maxwell Giddens / Julian Noah Steinhausen (27) def. William Clark / Pieter Wernink | 6-1, 6-4 |
2017
Boys 16 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | William Clark def. Cole Shoults | 0-1 Ret(inj) |
| 2nd Rd | Alexander Kiefer (42) def. William Clark | 6-2, 6-3 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 2nd Rd | Daniel Labrador def. William Clark | 6-2, 6-2 |
Boys 16 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Kenneth Boyette / William Clark def. Ian Brady / Presley Thieneman | 5-7, 7-5, 1-0(7) |
| 2nd Rd | Luis Iriarte Bastidas / Daniel Labrador (29) def. Kenneth Boyette / William Clark | 4-6, 7-6(4), 1-0(4) |