Stadium: Court 1 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Monastir | 2021/05/27 11:40 | Thomas Fancutt v Seita Watanabe | 7-6,4-6,6-2 |
| ITF - M15 Monastir | 2021/05/26 09:30 | Seita Watanabe v de Maio, Mauro | 6-3,6-3 |
| ITF - M15 Monastir | 2021/05/24 12:30 | Savva Polukhin v Seita Watanabe | 6-7,2-6 |
| ITF - M15 Monastir | 2021/05/24 08:00 | Vukovic, Luka v Seita Watanabe | 6-4,4-6,6-10 |
| ITF - M15 Monastir | 2021/05/19 12:25 | Luca Potenza v Seita Watanabe | 6-1,7-5 |
| ITF - M15 Monastir | 2021/05/17 12:30 | Uisung Park v Seita Watanabe | 4-6,1-6 |
| ITF - M15 Monastir | 2021/05/16 08:00 | Giovanni Agostinetto v Seita Watanabe | 3-6,3-6 |
| ITF - M15 Monastir | 2021/05/09 09:00 | Jacob Brumm v Seita Watanabe | 7-5,6-3 |
| ITF - M15 Monastir | 2021/05/30 09:30 | Zayed, Mousa Shanan v Reinberg, Emil | 1-6,1-6 |
| ITF - M15 Monastir | 2021/05/23 09:00 | Reinberg, Emil v de Maio, Mauro | 4-6,5-7 |
| ITF - M15 Monastir | 2021/05/16 10:00 | Reinberg, Emil v Giacomo Revelli | 4-6,2-6 |
| ITF - M15 Antalya | 2021/04/06 07:00 | Sandro Kopp v Reinberg, Emil | 6-0,6-4 |
| ITF - M15 Antalya | 2021/04/05 07:00 | Reinberg, Emil v Oh, Seong-Gook | 6-2,6-2 |
| Tulsa, Singles Main, M-ITF-USA-16A | 2019/06/19 15:00 | Reinberg, Emil v Redlicki, Michael | 6-3,2-6,3-6 |
| ITF - M25 Wichita | 2019/06/12 15:00 | Reinberg, Emil v Sumit Sarkar | 2-6,2-6 |
| Challenger Charlottesville | 2018/10/27 16:10 | Reinberg, Emil v Stefan Kozlov | 6-3,6-7,1-6 |