Stadium: Court 5 Round: 25 Ground: Clay
| ITF M15 Tsukuba | 2019/03/30 01:00 | Mick Veldheer v Jumpei Yamasaki | 2-6,2-6 |
| ITF M25 Meerbusch | 2021/04/11 12:30 | Mick Veldheer v Alessio Vasquez Gehrke | 1-6,6-0,9-11 |
| Challenger Split | 2021/04/04 09:00 | Mick Veldheer v Uladzimir Ignatik | 1-6,3-6 |
| ITF M25 Biel | 2021/03/31 10:40 | Mick Veldheer v Alexis Gautier | 4-6,0-6 |
| ITF M25 Biel | 2021/03/30 10:00 | Mick Veldheer v Jakub Paul | 6-2,4-6,10-6 |
| ITF M25 Biel | 2021/03/29 14:30 | Mick Veldheer v Jan Sebesta | 6-3,6-1 |
| ITF M15 Poitiers | 2021/03/17 09:00 | Mick Veldheer v Martin Breysach | 1-6,6-4,6-7 |
| ITF M15 Antalya | 2021/02/24 11:25 | Matias Zukas v Mick Veldheer | 6-4,6-1 |
| ITF M15 Antalya | 2021/02/16 07:00 | David Pichler v Mick Veldheer | 6-2,6-2 |
| ITF M15 Antalya | 2021/04/20 07:00 | Jumpei Yamasaki v Bogdan Bobrov | 3-6,5-7 |
| ITF M15 Antalya | 2021/04/13 07:00 | Jumpei Yamasaki v Karl Friberg | 1-6,2-6 |
| ITF M15 Sharm El Sheikh | 2021/03/03 07:30 | Martins Podzus v Jumpei Yamasaki | 7-5,6-3 |
| ITF M15 Sharm El Sheikh | 2021/02/24 12:25 | Jumpei Yamasaki v Shintaro Imai | 6-7,6-7 |
| ITF M15 Sharm El Sheikh | 2021/02/17 12:45 | Lucas Catarina v Jumpei Yamasaki | 6-2,6-4 |
| ITF M15 Sharm El Sheikh | 2021/02/08 09:30 | Jumpei Yamasaki v Chien Hsun Lo | 3-6,4-6 |
| ITF M15 Sharm El Sheikh | 2021/02/07 13:00 | Jumpei Yamasaki v Rishi Reddy | 6-4,6-4 |
| ITF M15 Sharm El Sheikh | 2021/02/01 12:30 | Jumpei Yamasaki v Daisuke Sumizawa | 6-4,1-6,8-10 |