Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Monastir | 2021/08/25 07:30 | Kazuki Nishiwaki v Seelig, Kyle | 1-6,5-7 |
| ITF - M15 Monastir | 2021/08/24 07:30 | Kazuki Nishiwaki v Daniel Batista | 6-3,6-4 |
| ITF - M15 Monastir | 2021/08/23 08:00 | Kazuki Nishiwaki v Nemakal, Ajay Pruthvi | 6-2,6-3 |
| ITF - M15 Monastir | 2021/06/20 09:00 | Kazuki Nishiwaki v Lambling, Raphael | 3-6,4-6 |
| ITF - M15 Monastir | 2021/06/13 08:00 | Kazuki Nishiwaki v Kody Pearson | 4-6,2-6 |
| ITF - M15 Monastir | 2021/06/07 09:00 | Kazuki Nishiwaki v Kim, Dong Ju | 2-6,3-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/02 06:00 | Stalder, Reese v Kazuki Nishiwaki | 7-6,7-5 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/26 02:30 | Kazuki Nishiwaki v Kawakami, Rimpei | 6-7,2-6 |
| ITF - M15 Monastir | 2021/08/30 13:00 | Arjun Mehrotra v Griffith, William | 4-6,6-3,5-10 |
| ITF - M15 Monastir | 2021/08/22 10:00 | Griffith, William v Da Silva, Gabriel Ciro | 6-4,6-7,4-10 |
| ITF M25 Decatur | 2021/08/02 15:00 | Griffith, William v Ezekiel Clark | 6-4,6-7,4-10 |
| ITF M25 Champaign | 2021/07/28 21:10 | Griffith, William v Strong Kirchheimer | 6-3,6-7,4-6 |
| ITF M25 Champaign | 2021/07/27 14:50 | Takeuchi, Kento (1987) v Griffith, William | 4-6,3-6 |
| ITF M25 Champaign | 2021/07/26 15:00 | Abraham Asaba v Griffith, William | 2-6,2-6 |
| ITF M15 Edwardsville | 2021/07/23 14:00 | Griffith, William v Cannon Kingsley | 3-6,2-6 |
| ITF M15 Edwardsville | 2021/07/22 16:50 | Boyer, Dusty H v Griffith, William | 6-4,6-7,1-6 |