Stadium: Pista 3 Round: 25 Ground: Hardcourt outdoor
| Challenger Pozoblanco | 2021/07/24 19:30 | Michael Geerts v Cem Ilkel | 2-6,7-6,4-6 |
| Challenger Pozoblanco | 2021/07/23 18:00 | Michael Geerts v Emilio Nava | 7-6,7-6 |
| Challenger Pozoblanco | 2021/07/22 16:00 | Benjamin Bonzi v Michael Geerts | 6-7,2-6 |
| Challenger Pozoblanco | 2021/07/20 17:55 | Michael Geerts v Kaichi Uchida | 6-1,6-2 |
| Challenger Pozoblanco | 2021/07/19 15:00 | Michael Geerts v Diego Hidalgo | 7-6,6-3 |
| Challenger Pozoblanco | 2021/07/18 19:45 | Michael Geerts v Mark Vervoort | 6-1,6-0 |
| Challenger Amersfoort | 2021/07/13 17:00 | Tallon Griekspoor v Michael Geerts | 6-2,7-6 |
| Challenger Amersfoort | 2021/07/12 10:40 | Michael Geerts v Diego Hidalgo | 7-6,6-3 |
| ATP Washington | 2021/07/31 19:05 | Tatsuma Ito v Sebastian Ofner | 6-7,2-6 |
| Challenger Lexington | 2021/07/26 22:30 | Tatsuma Ito v Maxime Cressy | 6-4,3-6,4-6 |
| Challenger Cary | 2021/07/20 15:00 | Sam Riffice v Tatsuma Ito | 6-7,6-4,7-5 |
| Challenger Porto | 2021/07/02 10:00 | Altug Celikbilek v Tatsuma Ito | 7-5,6-3 |
| Challenger Porto | 2021/06/29 10:00 | Tatsuma Ito v Luis Faria | 6-0,6-2 |
| Wimbledon | 2021/06/23 13:45 | Tatsuma Ito v Jason Jung | 2-6,1-6 |
| Wimbledon | 2021/06/22 11:35 | Elias Ymer v Tatsuma Ito | 3-6,4-6 |
| ATP Halle | 2021/06/12 09:00 | Ilya Ivashka v Tatsuma Ito | 6-1,6-3 |