Stadium: Court 3 Round: 25 Ground: Clay
| Challenger - Salzburg | 2021/07/05 09:00 | Jeroen Vanneste v Alexander Erler | 4-6,2-6 |
| Challenger - Salzburg | 2021/07/04 11:10 | Yosuke Watanuki v Jeroen Vanneste | 3-6,2-6 |
| Challenger - Prostejov | 2021/06/14 08:30 | Alex Rybakov v Jeroen Vanneste | 7-6,7-6 |
| Challenger - Prostejov | 2021/06/13 11:25 | Adam Jurajda v Jeroen Vanneste | 6-4,6-7,1-6 |
| ITF - M15 Antalya | 2021/05/05 08:25 | Jeroen Vanneste v Yanki Erel | 7-6,5-7,5-7 |
| ITF - M15 Antalya | 2021/05/02 09:20 | Sandro Ehrat v Jeroen Vanneste | 4-6,3-6 |
| ITF - M15 Antalya | 2021/05/01 07:30 | Peter Heller v Jeroen Vanneste | 3-6,3-6 |
| ITF - M15 Antalya | 2021/04/30 07:15 | Oleksii Krutykh v Jeroen Vanneste | 4-6,6-1,1-6 |
| ITF M15 Poprad | 2021/07/06 10:20 | George Loffhagen v Bogdan Ionut Apostol | 6-3,6-1 |
| UTR Pro Tennis Series Boekarest | 2021/05/23 07:40 | Bogdan Ionut Apostol v Bogdan Borza | 4-6,3-2 |
| UTR Pro Tennis Series Boekarest | 2021/05/22 09:42 | Bogdan Ionut Apostol v George Botezan | 3-6,6-2,6-3 |
| UTR Pro Tennis Series Boekarest | 2021/05/21 16:30 | Jules Marie v Bogdan Ionut Apostol | 7-5,6-4 |
| UTR Pro Tennis Series Boekarest | 2021/05/21 10:00 | Stefan Palosi v Bogdan Ionut Apostol | 6-4,6-3 |
| UTR Pro Tennis Series Boekarest | 2021/05/19 08:30 | Ilya Snitari v Bogdan Ionut Apostol | 6-3,2-6,5-2 |
| UTR Pro Tennis Series Boekarest | 2021/05/17 12:00 | Calin Manda v Bogdan Ionut Apostol | 6-4,3-6,2-5 |
| Challenger - Iași | 2020/09/12 09:25 | Manuel Guinard v Bogdan Ionut Apostol | 6-3,6-3 |