| ITF USA F31 | 11/14 17:25 | 25 | Arconada, Jordi v Johnson, Trevor Allen | 6-3,6-3 | |
| ITF USA F30 | 11/09 19:00 | 27 | Ornago, Fabrizio v Johnson, Trevor Allen | 6-2,6-4 | |
| ITF USA F30 | 11/08 18:30 | 26 | Hernandez Serrano, Juan Alejandro v Johnson, Trevor Allen | 6-7,0-6 | |
| ITF USA F30 | 11/07 20:05 | 25 | Luquet, Pierre v Johnson, Trevor Allen | 5-7,6-2,1-6 | |
| Challenger Las Vegas | 10/20 22:05 | 45 | Johnson, Trevor Allen v Sarkissian, Alexander | 4-6,2-6 | |
| ITF USA F22 | 08/08 14:00 | 25 | Johnson, Trevor Allen v Boltz, Sebastien | 6-4,2-6,3-6 | |
| ITF USA F19 | 07/05 17:05 | 26 | Ryan Peniston v Johnson, Trevor Allen | 6-2,6-2 | |
| ITF USA F19 | 07/03 13:30 | 25 | Johnson, Trevor Allen v Evan Zhu | 6-2,4-6,6-3 | |
| ITF USA F17 | 06/29 15:00 | 27 | Johnson, Trevor Allen v Marc-Andrea Huesler | 6-3,6-7,4-6 | |
| ITF USA F17 | 06/28 18:00 | 26 | Scholtz, Nicolaas v Johnson, Trevor Allen | 6-7,4-6 | |
| ITF USA F17 | 06/27 15:00 | 25 | Gozun, Alexandru v Johnson, Trevor Allen | 6-3,6-7,4-6 | |
| ITF USA F15 | 06/21 16:20 | 26 | Craig, Henry v Johnson, Trevor Allen | 4-6,6-3,7-5 | |
| ITF USA F15 | 06/20 14:00 | 25 | Johnson, Trevor Allen v Collin Altamirano | Retired | |
| ITF USA F15 Qual | 06/18 17:05 | 62 | Johnson, Trevor Allen v Brymer, Gage | 6-1,2-6,7-6 | |
| ITF USA F15 Qual | 06/17 14:00 | 62 | Johnson, Trevor Allen v Kopinski, Tim | 7-6,4-6,6-1 | |
| ITF USA F13 | 06/12 14:00 | 25 | Johnson, Trevor Allen v Solomon, Yuval | 7-5,4-6,4-6 | |
| ITF USA F13 Qual | 06/11 14:00 | 62 | Johnson, Trevor Allen v Terry, Matthew | 6-3,4-6,7-6 | |
| ITF USA F13 Qual | 06/10 14:00 | 62 | Johnson, Trevor Allen v Kelly, Robert | 6-1,6-1 | |
| ITF USA F13 Qual | 06/09 13:00 | 62 | Johnson, Trevor Allen v Johnson, Austin | 6-1,6-1 | |
| ITF USA F2 | 01/10 22:25 | 25 | Riffice, Sam v Johnson, Trevor Allen | 3-6,6-4,6-3 | |
| ITF USA F39 | 12/01 19:20 | 28 | Ward, Alexander v Johnson, Trevor Allen | 6-2,7-5 | |
| ITF USA F39 | 11/30 19:40 | 27 | Johnson, Trevor Allen v Krajicek, Austin | 6-3,6-0 | |
| ITF USA F39 | 11/29 16:00 | 26 | Johnson, Trevor Allen v Soderlund, Carl | 6-1,6-2 | |
| ITF USA F39 | 11/28 17:15 | 25 | Nevolo, Dennis v Johnson, Trevor Allen | 3-6,1-6 | |
| ITF USA F39 Qual | 11/27 17:35 | 62 | Johnson, Trevor Allen v Lucas Gerch | 7-5,6-3 | |
| ITF USA F39 Qual | 11/25 20:00 | 62 | Johnson, Trevor Allen v Siegler, Louis | 6-2,6-1 | |
| Challenger Las Vegas Qual | 10/15 18:00 | 46 | Johnson, Trevor Allen v Nielsen, Frederik | 7-6,2-6,3-6 | |
| Challenger Las Vegas Qual | 10/14 17:30 | 45 | Johnson, Trevor Allen v Clarke, Curtis | 6-0,6-1 | |
| USA F33, Singles | 10/10 15:00 | 25 | Christopher Eubanks v Johnson, Trevor Allen | 7-5,3-6,7-5 | |
| ITF USA F33 Qual | 10/09 15:00 | 62 | Kiger, Mac v Johnson, Trevor Allen | 2-6,4-6 |