Stadium: Court 2 Round: 28 Ground: Hardcourt outdoor
| ITF M25 Tulsa | 2021/06/16 14:00 | Nathan Ponwith v Sam Riffice | 5-7,4-6 |
| US Open | 2021/08/30 19:10 | Grigor Dimitrov v Sam Riffice | 6-1,7-6,6-3 |
| Challenger Lexington | 2021/07/25 20:30 | Stefan Kozlov v Sam Riffice | 6-2,6-3 |
| Challenger Cary | 2021/07/22 18:00 | Sam Riffice v Prajnesh Gunneswaran | 2-6,4-6 |
| Challenger Cary | 2021/07/20 15:00 | Sam Riffice v Tatsuma Ito | 6-7,6-4,7-5 |
| ITF M25 Tulsa | 2021/06/19 14:00 | Genaro Alberto Olivieri v Sam Riffice | 7-6,7-6 |
| ITF M25 Tulsa | 2021/06/18 14:00 | Gage Brymer v Sam Riffice | 0-6,6-7 |
| ITF M25 Tulsa | 2021/06/17 14:00 | Sam Riffice v Jason Kubler | 6-1,6-4 |
| ITF M25 Tulsa | 2021/06/16 14:00 | Nathan Ponwith v Sam Riffice | 5-7,4-6 |
| ITF M15 Vero Beach | 2022/04/28 17:00 | Millen Hurrion v Nathan Ponwith | 7-5,6-3 |
| ITF M15 Vero Beach | 2022/04/27 18:20 | Isaiah Strode v Nathan Ponwith | 1-6,2-6 |
| ITF M15 Orange Park | 2022/04/21 16:40 | Nathan Ponwith v Michael Zheng | 1-6,6-7 |
| ITF M15 Orange Park | 2022/04/20 23:00 | Strong Kirchheimer v Nathan Ponwith | 6-4,4-6,2-6 |
| ITF M15 Sunrise | 2022/04/15 13:55 | Kyle Kang v Nathan Ponwith | 6-3,6-3 |
| ITF M15 Sunrise | 2022/04/14 13:50 | Nathan Ponwith v Ezekiel Clark | 5-7,7-5,6-0 |
| ITF M15 Sunrise | 2022/04/13 14:00 | Nathan Ponwith v Hillel Rousseau | 6-2,6-2 |
| ITF M25 Calabasas | 2022/03/22 21:10 | Nathan Ponwith v Rinky Hijikata | 3-6,6-3,2-6 |