Sebastian Mermersky
| Division | 18 |
| Home Town | Washington, DC |
| USTA Section | Mid-Atlantic (MATA) |
| Singles Line | 51 |
| Singles Seed | 0 |
| Doubles Line | 11 |
| Doubles Seed | 0 |
2016
Boys 18 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Erik Kerrigan / Eric Morris def. Mitchell Iwahiro / Sebastian Mermersky | 6-2, 5-7, 1-0(5) |
Boys 18 Singles
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Jeremy Yuan def. Sebastian Mermersky | 6-0, 6-3 |
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Evan Bynoe def. Sebastian Mermersky | 6-1, 4-0 Ret(ill) |
2014
Boys 16 Singles
Feed-In
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Sebastian Mermersky (16) def. Tyler Raclin | 6-3, 6-4 |
| 2nd Rd | Sebastian Mermersky (16) def. Jake Berber | 6-2, 6-0 |
| 3rd Rd Qualifying | Nick Stachowiak def. Sebastian Mermersky (16) | 6-3, 6-1 |
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Max Liu def. Sebastian Mermersky (16) | 6-0, 7-6(5) |
Boys 16 Doubles
Main Draw
| Round | Players | Final Score |
|---|---|---|
| 1st Rd | Bye | Automatic Advance |
| 2nd Rd | Jordan Benjamin / Sebastian Mermersky (7) def. Matthew Jacobs / Matthew Lord | 6-4, 6-2 |
| 3rd Rd | Jordan Benjamin / Sebastian Mermersky (7) def. Nicholas Beaty / Kyrylo Tsygura | 6-3, 7-6(7) |
| 4th Rd | Daniel Boussom / Connor Johnston def. Jordan Benjamin / Sebastian Mermersky (7) | 6-4, 5-7, 1-0(8) |