| Mouilleron-Le-Captif, France | 2021/10/03 11:35 | Eysseric, Jonathan v Titouan Droguet | 6-2,2-6,4-6 |
| Challenger Kyiv | 2021/09/05 09:55 | Denis Yevseyev v Eysseric, Jonathan | 6-0,6-2 |
| Iasi, Romania | 2021/07/11 14:45 | Miljan Zekic v Eysseric, Jonathan | 6-2,6-2 |
| ITF M25 Bourg-en-Bresse | 2021/06/30 13:30 | Eysseric, Jonathan v Nikolas Sanchez Izquierdo | 2-6,7-5,1-6 |
| ITF M25 Montauban | 2021/06/27 08:30 | Franco Agamenone v Eysseric, Jonathan | 6-2,6-1 |
| ITF M25 Montauban | 2021/06/26 09:00 | Eysseric, Jonathan v Valentin Royer | 6-4,4-6,7-6 |
| ITF M25 Montauban | 2021/06/25 10:00 | Viktor Durasovic v Eysseric, Jonathan | 3-6,2-6 |
| ITF M25 Montauban | 2021/06/24 11:50 | Mora, Maxime v Eysseric, Jonathan | 3-6,4-6 |
| German Championship | 2021/12/07 15:00 | Kai Lemstra v Tom Schonenberg | 3-6,0-6 |
| ITF - M15 Héraklion | 2021/11/23 07:00 | Nicholas David Ionel v Kai Lemstra | 3-6,7-5,10-4 |
| ITF - M15 Héraklion | 2021/11/22 08:00 | Sergis Kyratzis v Kai Lemstra | 4-6,2-6 |
| ITF - M15 Héraklion | 2021/11/21 07:00 | Puttergill, Liam v Kai Lemstra | 2-6,1-6 |
| ITF - M15 Héraklion | 2021/11/17 08:05 | Alastair Gray v Kai Lemstra | 6-1,7-5 |
| ITF - M15 Héraklion | 2021/11/16 07:00 | Max Houkes v Kai Lemstra | 4-6,6-7 |
| ITF - M15 Héraklion | 2021/11/15 08:00 | Gleeson, Alan v Kai Lemstra | 6-7,3-6 |
| ITF - M15 Héraklion | 2021/11/12 10:05 | Kai Lemstra v Peter Fajta | 6-4,1-6,2-6 |