Stadium: Court 1 Round: 28 Ground: Hardcourt indoor
| ITF M25 Pardubice | 2021/09/22 10:50 | Matvey Minin v Henri Squire | 6-3,3-6,4-6 |
| ITF M15 Allershausen | 2021/09/01 11:15 | Peter Heller v Henri Squire | 6-3,3-6,6-4 |
| ITF M25 Trier | 2021/08/28 12:40 | Louis Wessels v Henri Squire | 7-5,5-7,6-3 |
| ITF M25 Trier | 2021/08/27 15:00 | Ryan Nijboer v Henri Squire | 2-6,3-6 |
| ITF M25 Trier | 2021/08/26 11:50 | Moez Echargui v Henri Squire | 6-3,1-6,2-6 |
| ITF M25 Trier | 2021/08/25 15:00 | Henri Squire v Oliver Crawford | 3-6,6-1,6-2 |
| ITF M25 Ueberlingen | 2021/08/22 12:00 | Ergi Kirkin v Henri Squire | 6-3,4-6,6-4 |
| ITF M25 Ueberlingen | 2021/08/20 14:45 | Louis Wessels v Henri Squire | 4-6,6-2,4-6 |
| ITF M25 Jonkoping | 2021/09/20 10:45 | Filip Bergevi v Johannes Haerteis | 6-4,7-6 |
| ITF M25 Plaisir | 2021/09/15 11:45 | Johannes Haerteis v Leny Mitjana | 4-6,6-7 |
| Challenger Tulln | 2021/09/06 13:00 | Johannes Haerteis v Filip Horansky | 6-4,4-6,3-6 |
| Challenger Mallorca | 2021/09/01 18:40 | Johannes Haerteis v Lukas Lacko | 2-6,3-6 |
| Challenger Mallorca | 2021/08/31 08:00 | Nicolas Moreno De Alboran v Johannes Haerteis | 3-6,6-4,4-6 |
| Challenger Mallorca | 2021/08/30 08:00 | Sergio Martos Gornes v Johannes Haerteis | 1-6,1-6 |
| Challenger Prague | 2021/08/24 10:15 | Johannes Haerteis v Alex Rybakov | 4-6,2-6 |
| Challenger Luedenscheid | 2021/08/15 09:30 | Bogdan Bobrov v Johannes Haerteis | 1-6,6-4,6-3 |