William Mertz
| Division | 18 |
| Home Town | Silver Spring, MD |
| USTA Section | Mid-Atlantic (MATA) |
| Singles Line | 104 |
| Singles Seed | 0 |
| Doubles Line | 61 |
| Doubles Seed | 0 |
2004
Boys 18 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | William Mertz def. Jordan Kukino | 6-0, 6-0 |
| 2nd Rd | William Mertz def. Kyle McDonald | 6-4, 6-3 |
| 3rd Rd | Daniel Yoo (8) def. William Mertz | 6-3, 6-2 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 3rd Rd | Jay Weinacker def. William Mertz | 6-4, 7-6(3) |
Boys 18 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | William Mertz / Matthew Rubenstein def. Joel Kincaid / Peter Kung | 6-2, 6-4 |
| 3rd Rd | Travis Helgeson / Sukhwa Young (14) def. William Mertz / Matthew Rubenstein | 6-1, 6-1 |
2003
Boys 18 Singles
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Jeremy Sonkin def. William Mertz | 6-1, 6-3 |
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Christopher Rea def. William Mertz | 6-2, 6-1 |
2002
Boys 16 Singles
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | William Mertz def. Bryan Bankester | 6-4, 6-1 |
| 3rd Rd Qualifying | Andrew Felsenthal def. William Mertz | 6-4, 1-6, 6-2 |
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Sasha Ermakov def. William Mertz | 7-6(5), 6-2 |
Boys 16 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Mak Kendall / William Mertz (16) def. Alex Birchmeier / Kurt Zaske | 6-3, 6-3 |
| 3rd Rd | Mak Kendall / William Mertz (16) def. Sasha Ermakov / Aneal Vallurupalli | 6-2, 6-2 |
| 4th Rd | Philip Kao / Eric Roberson (3) def. Mak Kendall / William Mertz (16) | 6-4, 6-4 |