| Challenger Champaign Qual | 11/11 17:20 | 45 | Nathaniel Lammons v Alafia Ayeni | 3-6,4-6 | |
| Challenger Charlottesville Qual | 10/28 19:05 | 45 | [385] Edward Corrie v Nathaniel Lammons [257] | 6-4,6-2 | |
| ITF France F20 Qual | 09/17 08:00 | 62 | Nathaniel Lammons v Constantin B Kouzmine | 3-6,3-6 | |
| ITF France F19 | 09/13 14:15 | 25 | [314] David Guez v Nathaniel Lammons [321] | 6-3,6-3 | |
| ITF France F19 Qual | 09/11 14:20 | 54 | Nathaniel Lammons v Leon Hoeveler | 6-3,6-2 | |
| ITF France F19 Qual | 09/10 13:45 | 54 | Nathaniel Lammons v Julien Eon | 1-6,7-5,6-4 | |
| ITF France F18 | 09/04 09:30 | 25 | Evan Furness v Nathaniel Lammons | 6-7,7-5,6-3 | |
| ITF France F18 Qual | 09/03 08:00 | 54 | Nathaniel Lammons v Nathan Seateun | 6-4,6-2 | |
| ITF France F18 Qual | 09/02 10:45 | 54 | Nathaniel Lammons v Enrico Becuzzi | 6-0,6-0 | |
| ITF USA F27 | 08/08 14:30 | 25 | Nathaniel Lammons v Alex Rybakov | 4-6,3-6 | |
| ITF USA F26 | 08/01 15:00 | 25 | Ricardo Rodriguez v Nathaniel Lammons | 6-3,6-1 | |
| ITF Egypt F21 | 07/19 17:00 | 25 | Bernardo Saraiva v Nathaniel Lammons | 7-6,2-6,6-0 | |
| ITF Egypt F20 | 07/13 16:00 | 26 | Mohamed Safwat v Nathaniel Lammons | 6-4,7-6 | |
| ITF Egypt F20 | 07/12 16:00 | 25 | Nathaniel Lammons v Aswin Lizen | 7-6,7-6 | |
| ITF Zimbabwe F3 | 06/29 07:00 | 27 | [408] Nathaniel Lammons v Nicolaas Scholtz [410] | 3-6,1-6 | |
| ITF Zimbabwe F3 | 06/28 07:00 | 26 | Nathaniel Lammons v Franco Feitt | 6-4,6-7,6-3 | |
| ITF Zimbabwe F3 | 06/26 07:00 | 25 | Nathaniel Lammons v Mehluli D A Sibanda | 7-6,6-3 | |
| ITF Zimbabwe F2 | 06/21 09:40 | 25 | [448] Nathaniel Lammons v Nicolaas Scholtz [457] | 4-6,4-6 | |
| ITF Zimbabwe F1 | 06/15 07:00 | 26 | [440] Nicolaas Scholtz v Nathaniel Lammons [449] | 6-1,6-4 | |
| ITF Zimbabwe F1 | 06/13 07:00 | 25 | Nathaniel Lammons v Munashe Chingono | 6-2,6-0 | |
| ITF Mexico F4 | 05/15 16:00 | 62 | Nathaniel Lammons v Samuel Monette | 4-6,6-2,6-7 | |
| ITF Mexico F4 | 05/14 18:00 | 62 | Nathaniel Lammons v Denilson Martinez | 6-0,6-1 | |
| ITF Mexico F2 | 04/30 16:00 | 62 | Nathaniel Lammons v Isaac A Arevalo | 4-6,5-7 | |
| ITF Mexico F2 | 04/29 14:30 | 62 | Nathaniel Lammons v Lance A L Castelan | 6-0,6-1 | |
| ITF USA F13 Qual | 04/10 15:00 | 62 | Nathaniel Lammons v Christopher G Haworth | 6-1,3-6,4-6 | |
| ITF USA F12 Qual | 04/03 16:45 | 62 | Ryan Haviland v Nathaniel Lammons | 6-7,6-1,6-3 | |
| ITF USA F11 Qual | 03/18 16:00 | 62 | Nathaniel Lammons v Samir Iftikhar | 1-6,7-5,3-6 | |
| ITF USA F10 | 03/16 02:10 | 25 | Kimmer Coppejans v Nathaniel Lammons | 6-3,6-4 | |
| ITF USA F10 Qual | 03/13 20:30 | 62 | Nathaniel Lammons v Oliver Hudson | 0-6,6-0,7-6 | |
| ITF USA F10 Qual | 03/11 19:00 | 62 | Nathaniel Lammons v Michael Riechmann | 6-7,6-3,6-2 |