Billy Mulligan
| Division | 18 |
| Home Town | Miami, FL |
| USTA Section | Florida (FTA) |
| Singles Line | 0 |
| Singles Seed | 0 |
| Doubles Line | 0 |
| Doubles Seed | 0 |
2005
Boys 18 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Alex Vasin def. Billy Mulligan | 6-4, 6-1 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Jose Perdomo def. Billy Mulligan | 7-5, 5-7, 7-5 |
Boys 18 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Joshua Finkelstein / Kallim Stewart def. Christian Guevara / Billy Mulligan | 6-2, 6-4 |
2004
Boys 18 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Elliott Bisnow / Jeremy Sonkin def. Billy Mulligan / Tye Myers | 6-2, 3-6, 6-1 |
Boys 18 Singles
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Mike Beatty def. Billy Mulligan | 7-6(8), 6-0 |
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Ashwin Kumar def. Billy Mulligan | 6-0, 6-4 |
2003
Boys 18 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Billy Mulligan / Alex Ortega def. William Noblitt / Will Johnson Plyler | 6-4, 7-5 |
| 2nd Rd | Joshua Lederman / Kaes Van't Hof def. Billy Mulligan / Alex Ortega | 6-1, 4-6, 6-2 |
Boys 18 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Billy Mulligan def. Jason Hood | 6-2, 6-2 |
| 2nd Rd | Billy Mulligan def. Tyler Wilson | 4-6, 7-5, 6-3 |
| 3rd Rd | John Isner (14) def. Billy Mulligan | 6-1, 6-3 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 3rd Rd | David Stone def. Billy Mulligan | 7-6(4), 6-2 |
2002
Boys 16 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Christopher Cloer / Marc Dwyer def. Evan Dufaux / Billy Mulligan | 3-6, 6-3, 6-2 |
Boys 16 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Billy Mulligan def. Andrew Downing | 6-3, 6-4 |
| 3rd Rd | Timothy Neilly (4) def. Billy Mulligan | 6-4, 6-4 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 3rd Rd | Billy Mulligan def. Joey Jones | 6-1, 3-6, 6-4 |
| 4th Rd Qualifying | William Gray def. Billy Mulligan | 6-4, 6-4 |
2001
Boys 16 Singles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Billy Mulligan def. Kieran Burke | 6-2, 7-6(6) |
| 2nd Rd | Robbye Poole (23) def. Billy Mulligan | 6-2, 7-5 |
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 2nd Rd | Billy Mulligan def. Stuart Row | 6-0, 6-1 |
| 3rd Rd Qualifying | Jaysen Chung def. Billy Mulligan | 6-2, 6-2 |
Boys 16 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Alexandru Cojanu / Billy Mulligan def. John Caldwell / Nolan Polley | 2-6, 7-6(5), 7-6(5) |
| 3rd Rd | Jarmaine Jenkins / Konstantin Lazarov def. Alexandru Cojanu / Billy Mulligan | 4-6, 6-2, 6-4 |