Stadium: S+S Court Round: 54 Ground: Clay
| Challenger Heilbronn | 2021/05/09 11:55 | Christoph Negritu v Aleksandar Vukic | 5-7,2-6 |
| ITF M15 Monastir | 2021/04/25 08:30 | Igor Marcondes v Christoph Negritu | 2-6,2-6 |
| ITF M15 Monastir | 2021/04/24 09:30 | Omar Giacalone v Christoph Negritu | 4-6,2-6 |
| ITF M15 Monastir | 2021/04/22 10:35 | Christoph Negritu v Christian Langmo | 7-5,7-6 |
| ITF M15 Monastir | 2021/04/20 11:15 | Danylo Kalenichenko v Christoph Negritu | 2-6,4-6 |
| ITF M15 Monastir | 2021/04/14 12:05 | Christoph Negritu v Savva Polukhin | 5-7,4-6 |
| ITF M15 Monastir | 2021/04/10 08:30 | Franco Agamenone v Christoph Negritu | 6-1,6-3 |
| ITF M15 Monastir | 2021/04/08 11:25 | Mateus Alves v Christoph Negritu | 4-6,4-6 |
| ITF M25 The Hague | 2021/06/28 07:50 | Lodewijk Weststrate v Dax Donders | 6-7,6-1,10-5 |
| ITF M25 The Hague | 2021/06/27 08:00 | Dax Donders v Zachary Eisinga | 6-2,7-5 |
| ITF M25 Alkmaar | 2021/06/24 14:55 | Dax Donders v Javier Barranco Cosano | 4-6,2-6 |
| ITF M25 Alkmaar | 2021/06/23 18:05 | Dax Donders v Amaury Raynel | 5-7,6-3,6-1 |
| ITF M15 Skopje | 2021/05/30 08:00 | Dax Donders v Taiyo Yamanaka | 4-6,4-6 |
| ITF M15 Antalya | 2021/05/09 07:00 | Dax Donders v Alafia Ayeni | 5-7,3-6 |
| ITF M15 Antalya | 2021/05/03 07:00 | Dax Donders v Colin Sinclair | 6-1,3-6,4-10 |
| ITF M15 Antalya | 2021/05/02 06:00 | Dax Donders v Oscar Moraing | 4-6,6-4,10-7 |