Stadium: Court 1 Round: 25 Ground: Clay
| ITF M25 Bolzano | 2021/08/03 13:50 | Andrea Gola v Jeremy Jahn | 4-6,6-2,6-3 |
| ITF M25 Denia | 2021/07/27 17:25 | Carlos Lopez Montagud v Jeremy Jahn | 6-4,6-2 |
| ITF M25 Gandia | 2021/07/21 16:00 | Jordi Mas De Ugarte v Jeremy Jahn | 6-4,6-3 |
| Challenger Amersfoort | 2021/07/12 09:00 | Jeremy Jahn v Johan Nikles | 2-6,3-6 |
| Challenger Amersfoort | 2021/07/11 11:40 | Jeremy Jahn v Arjun Kadhe | 6-2,6-7,6-4 |
| ITF M25 Marburg | 2021/07/06 16:40 | Alexander Donski v Jeremy Jahn | 6-2,6-2 |
| ITF M25 The Hague | 2021/06/29 09:00 | Jeremy Jahn v Javier Barranco Cosano | 2-6,3-6 |
| ITF M25 Alkmaar | 2021/06/23 10:55 | Marvin Moeller v Jeremy Jahn | 6-2,6-0 |
| Challenger Segovia | 2021/07/26 09:00 | Alexander Cozbinov v Dalibor Svrcina | 1-6,6-2,2-6 |
| Challenger Segovia | 2021/07/25 09:00 | Federico Zeballos v Alexander Cozbinov | 1-6,1-6 |
| ITF M25 Idanha-A-Nova | 2021/07/22 08:00 | Alexander Cozbinov v Nicolas Moreno De Alboran | 6-3,6-7,6-7 |
| ITF M25 Idanha-A-Nova | 2021/07/21 11:35 | Alexander Cozbinov v Mehluli D A Sibanda | 6-3,6-0 |
| ITF M25 Idanha-A-Nova | 2021/07/16 08:00 | Alexander Cozbinov v Zane Khan | 0-6,5-7 |
| ITF M25 Idanha-A-Nova | 2021/07/15 07:50 | Alexander Cozbinov v Francisco Cabral | 7-5,6-4 |
| ITF M25 Idanha-A-Nova | 2021/07/13 14:05 | Sho Shimabukuro v Alexander Cozbinov | 3-6,6-3,6-7 |
| ITF M25 Belgrade | 2021/07/01 07:00 | Edoardo Lavagno v Alexander Cozbinov | 6-4,6-3 |