Stadium: Court 13 Round: 62 Ground: Hardcourt outdoor
| 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 |
| ITF Germany F11 | 2018/08/05 08:00 | Marvin Rehberg v Constantinos Papavasiliou | 6-1,6-2 |
| ITF Germany F10 Qual | 2018/07/29 10:30 | Constantinos Papavasiliou v Feda Bilic | 0-6,2-6 |