Stadium: Court 3 Round: 54 Ground: Clay
| ITF M25 Harlingen | 2021/11/10 16:30 | Nathan Ponwith v Bruno Kuzuhara | 2-6,3-6 |
| ITF M15 Fayetteville | 2021/11/03 21:00 | Nathan Ponwith v Duarte Vale | 6-2,3-6,3-6 |
| ITF M25 Calabasas | 2021/10/30 21:00 | Rinky Hijikata v Nathan Ponwith | 6-2,6-3 |
| ITF M25 Calabasas | 2021/10/29 18:00 | Nathan Ponwith v Max Basing | 6-4,6-4 |
| ITF M25 Calabasas | 2021/10/28 19:50 | Connor Farren v Nathan Ponwith | 7-6,0-6,5-7 |
| ITF M25 Calabasas | 2021/10/27 00:40 | Nathan Ponwith v Andre Ilagan | 6-3,6-3 |
| ITF M15 Ithaca | 2021/10/07 16:05 | A.J Catanzariti v Nathan Ponwith | 6-4,6-3 |
| ITF M15 Ithaca | 2021/10/06 15:00 | Evan Bynoe v Nathan Ponwith | 4-6,6-4,1-6 |
| UTR Pro Tennis Series Florida | 2021/09/12 15:00 | Preston Stearns v Patrick Daciek | 1-6,4-5 |
| UTR Pro Tennis Series Florida | 2021/09/11 16:30 | Preston Stearns v Jacob Perkins | 3-6,6-4,5-3 |
| UTR Pro Tennis Series Florida | 2021/09/09 13:30 | Preston Stearns v Jonah Braswell | 4-6,0-1 |
| UTR Pro Tennis Series Florida | 2021/09/08 13:30 | Preston Stearns v Matthew Segura | 6-4,7-6 |
| UTR Pro Tennis Series Florida | 2021/09/07 16:30 | Preston Stearns v Victor Sklenka | 4-6,7-5,4-6 |
| UTR Pro Tennis Series Florida | 2021/09/06 21:00 | Preston Stearns v Noureldin Adam | 2-6,6-4,2-6 |