Jonathan Mascagni
| Division | 18 |
| Home Town | Alpharetta, GA |
| USTA Section | Southern (STA) |
| Singles Line | 243 |
| Singles Seed | 0 |
| Doubles Line | 115 |
| Doubles Seed | 0 |
2018
Boys 18 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Jaycer Lyeons / Noah Schachter (30) def. Matthew Halpin / Jonathan Mascagni | 6-2, 6-4 |
Boys 18 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Jonathan Mascagni def. Pascal Lee | 6-1, 6-1 |
| 2nd Rd | Jonathan Mascagni def. Daniel Baturyn | 3-6, 6-4, 6-2 |
| 3rd Rd | Alexandre Rotsaert (30) def. Jonathan Mascagni | 6-3, 6-0 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 3rd Rd | Evin McDonald def. Jonathan Mascagni | 6-1, 6-2 |
2017
Boys 18 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Karl Poling def. Jonathan Mascagni | 7-6(5), 6-1 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Jonathan Mascagni def. Justin Bloss | 6-4, 6-4 |
| 2nd Rd | Michael Sun (53) def. Jonathan Mascagni | 6-3, 6-1 |
Boys 18 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Jonathan Mascagni / Tyler Stice def. Noah Dufort / Kobie Mueller | 3-6, 6-3, 1-0(3) |
| 2nd Rd | Hayden Cassone / Sean Wei (14) def. Jonathan Mascagni / Tyler Stice | 6-0, 4-6, 1-0(8) |
2016
Boys 16 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Jonathan Mascagni / Tyler Stice def. Niroop Vallabhaneni / Joshua Xu | 6-4, 6-0 |
| 3rd Rd | Jonathan Mascagni / Tyler Stice def. Keenan Mayo / Govind Nanda (7) | 6-4, 7-5 |
| 4th Rd | Robert Maciag / Jared Pratt (11) def. Jonathan Mascagni / Tyler Stice | 6-3, 6-3 |
Boys 16 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Dustin Kua def. Jonathan Mascagni | 7-5, 6-2 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Jonathan Mascagni def. Brandon Wong | Wo(inj) |
| 3rd Rd Qualifying | Maxwell Giddens def. Jonathan Mascagni | 6-0, 6-2 |