Stadium: Hard 20 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Ulcinj | 2021/09/19 08:00 | Moritz Poswiat v Joris Moret | 2-6,0-6 |
| ITF M25 Eupen | 2021/09/05 10:30 | Moritz Poswiat v Adrian Oetzbach | 0-6,3-6 |
| ITF M25 Koksijde | 2021/08/15 08:00 | Victor Ernaelsteen v Moritz Poswiat | 6-2,6-4 |
| ITF M15 Esch/Alzette | 2021/07/18 09:50 | Tim Heger v Moritz Poswiat | 7-6,4-6,11-9 |
| ITF M15 Quinta Do Lago | 2020/11/01 14:00 | Raphael Baltensperger v Moritz Poswiat | 7-6,6-0 |
| ITF M15 Alkmaar | 2020/08/23 11:00 | Moritz Poswiat v Egill Sigurdsson | 6-2,2-6,8-10 |
| ITF M15 Cancun | 2021/10/10 21:00 | Constantinos Papavasiliou v Juan Sebastian Osorio | 0-6,1-6 |
| ITF M25 Sintra | 2021/09/12 12:00 | Constantinos Papavasiliou v Pedro D L R Bueno | 1-6,2-6 |
| ITF M25 Sintra | 2021/09/05 12:00 | Constantinos Papavasiliou v Martim Simoes | 1-6,3-6 |
| ITF M15 Cairo | 2021/01/10 14:00 | Babji Siva Atturu v Constantinos Papavasiliou | 6-1,5-7,10-5 |
| ITF M15 Cancun | 2019/12/08 14:00 | Constantinos Papavasiliou v Jack Vance | 1-6,4-6 |
| ITF Turkey F38 | 2018/11/24 09:30 | Constantinos Papavasiliou v Ivan Zaytsev | 6-1,5-7,6-7 |
| ITF Greece F8 | 2018/11/13 09:25 | Stefan Seifert v Constantinos Papavasiliou | 6-0,6-1 |
| ITF Ukraine F4 | 2018/08/26 07:00 | Constantinos Papavasiliou v Oleksandr Varichenko | 0-6,3-6 |