Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF - Monastir M15 | 2021/05/05 10:25 | Constantin Bittoun Kouzmine v Imran Sibille | 6-2,6-1 |
| ITF - Monastir M15 | 2021/05/04 08:00 | Alessandro Pecci v Constantin Bittoun Kouzmine | 5-7,6-7 |
| ITF - Monastir M15 | 2021/05/03 13:00 | Francois Musitelli v Constantin Bittoun Kouzmine | 1-6,7-5,7-10 |
| ITF - Monastir M15 | 2021/04/28 11:25 | Constantin Bittoun Kouzmine v Arthur Bouquier | 2-6,3-6 |
| ITF - Monastir M15 | 2021/04/26 12:30 | Lorenzo Bresciani v Constantin Bittoun Kouzmine | 5-7,3-6 |
| ITF - Monastir M15 | 2021/04/26 08:00 | Daiki Yoshimura v Constantin Bittoun Kouzmine | 3-6,3-6 |
| ITF - Monastir M15 | 2021/04/25 10:30 | Miguel Fernando Pereira v Constantin Bittoun Kouzmine | 2-6,3-6 |
| ITF - St Petersburg M15 | 2021/04/15 09:45 | Constantin Bittoun Kouzmine v Alexey Zakharov | 4-6,4-6 |
| ITF - Monastir M15 | 2021/05/04 10:30 | Robert Strombachs v Yusuke Takahashi | 3-6,6-3,1-6 |
| Challenger Salinas 2 | 2021/04/26 18:00 | Nicolas Alvarez v Yusuke Takahashi | 7-6,6-0 |
| Challenger Salinas | 2021/04/19 14:30 | Facundo Diaz Acosta v Yusuke Takahashi | 6-2,6-2 |
| Challenger Salinas | 2021/04/18 16:55 | Gage Brymer v Yusuke Takahashi | 4-6,4-6 |
| ITF - Sharm El Sheikh M15 | 2021/03/17 09:05 | Lucas Miedler v Yusuke Takahashi | 6-4,6-2 |
| ITF - Sharm El Sheikh M15 | 2021/03/10 07:30 | Yusuke Takahashi v Aldin Setkic | 3-6,2-6 |
| ITF - Sharm El Sheikh M15 | 2021/03/04 09:05 | Nick Hardt v Yusuke Takahashi | 6-3,6-2 |
| ITF - Sharm El Sheikh M15 | 2021/03/03 14:10 | Hanwen Li v Yusuke Takahashi | 6-4,2-6,6-7 |