Jonathan Chang
| Division | 18 |
| Home Town | Houston, TX |
| USTA Section | Texas (TTA) |
| Singles Line | 95 |
| Singles Seed | 0 |
| Doubles Line | 36 |
| Doubles Seed | 0 |
2009
Boys 18 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Clarke Spinosa def. Jonathan Chang | 6-0, 7-5 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Jonathan Chang def. Parker Kelley | 6-1, 6-2 |
| 3rd Rd Qualifying | Jonathan Chang def. John Warden | 6-2, 6-4 |
| 3rd Rd | Jonathan Chang def. William Federhofer | Def(ns) |
| 4th Rd Qualifying | Jonathan Chang def. Michael Zhu | 3-6, 6-2, 6-3 |
| 4th Rd | Jonathan Chang def. Joseph Schafer | Wo(inj) |
| 5th Rd Qualifying | Michael Moore def. Jonathan Chang | 6-3, 5-7, 6-2 |
Boys 18 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Jonathan Chang / Alex Van Velzer def. Devin McCarthy / Anderson Reed | 4-6, 7-6(5), 7-6(5) |
| 2nd Rd | Jonathan Chang / Alex Van Velzer def. Jordan Cox / Raymond Sarmiento (3) | 7-6(4), 7-6(4) |
| 3rd Rd | Jonathan Chang / Alex Van Velzer def. Max Manthou / Alex Rovello | 6-2, 6-0 |
| 4th Rd | Christopher Mengel / Christian Schultz (16) def. Jonathan Chang / Alex Van Velzer | 6-4, 6-3 |
2007
Boys 16 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Joseph Schafer def. Jonathan Chang | 6-2, 6-4 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Christopher Freeman def. Jonathan Chang | 6-2, 6-2 |
Boys 16 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Evan Meltzer / Zachary Weiss def. Jonathan Chang / Tim Kuo | 6-4, 6-4 |