Stadium: Court 11 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Cancun | 2021/10/05 15:30 | Naoki Tajima v Jose Pereira | 2-6,2-6 |
| ITF M15 Monastir | 2021/08/25 08:55 | Naoki Tajima v Yuta Kawahashi | 3-6,4-6 |
| ITF M15 Monastir | 2021/08/19 07:30 | Gage Brymer v Naoki Tajima | 6-3,6-3 |
| ITF M15 Monastir | 2021/08/17 08:30 | Naoki Tajima v Preston Connor | 6-1,6-0 |
| ITF M15 Monastir | 2021/08/12 14:50 | Sho Shimabukuro v Naoki Tajima | 6-1,7-6 |
| ITF M15 Monastir | 2021/08/11 19:05 | Seif Adas v Naoki Tajima | 2-6,3-6 |
| ITF M15 Castelo Branco | 2021/07/27 12:10 | Naoki Tajima v Martin Breysach | 6-3,2-6,2-6 |
| ITF M25 Idanha-A-Nova | 2021/07/20 10:45 | Anton Matusevich v Naoki Tajima | 6-3,7-5 |
| ITF M15 Cancun | 2021/10/05 14:00 | Matt Kuhar v Nikolas Moceanu | 6-4,6-4 |
| ITF M15 Cancun | 2021/09/26 15:00 | Nikolas Moceanu v Julian Cundom | 6-1,4-6,9-11 |
| ITF M15 Cancun | 2021/09/22 14:00 | Murkel Dellien v Nikolas Moceanu | 6-3,6-3 |
| ITF M15 Cancun | 2021/09/21 14:00 | Colin Markes v Nikolas Moceanu | 6-3,6-2 |
| ITF M15 Cancun | 2021/09/19 14:00 | Nikolas Moceanu v Oscar Matias Leiva Biason | 6-1,6-3 |
| ITF M15 Monastir | 2021/08/01 10:00 | Nikolas Moceanu v Martin Dimitrov | 3-6,2-6 |
| ITF M15 Monastir | 2021/07/28 10:15 | Joshua Sheehy v Nikolas Moceanu | 3-6,6-1,6-2 |
| ITF M15 Monastir | 2021/07/11 11:00 | Nikolas Moceanu v Joshua Sheehy | 6-7,5-7 |