Round: 44 Ground: Hardcourt outdoor
| 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 |
| ITF Germany F9 | 2017/07/30 13:30 | Constantinos Papavasiliou v Benjamin Loccisano | 0-6,2-6 |
| ITF Romania F2 Qual | 2017/05/20 09:00 | Constantinos Papavasiliou v Luca George Tatomir | 2-6,5-7 |
| ITF Greece F4 | 2017/03/25 09:30 | Liam Caruana v Constantinos Papavasiliou | 6-1,6-0 |
| ITF Turkey F51 Qual | 2016/12/19 07:30 | Constantinos Papavasiliou v Nicolas Barz | 0-6,1-6 |
| ITF Turkey F35 | 2018/11/03 07:00 | Yan Sabanin v Ivan Zaytsev | 2-6,6-4,6-3 |
| ITF Turkey F29 | 2018/09/23 07:30 | Ivan Zaytsev v Philip Bachmaier | 4-6,0-6 |
| ITF Turkey F29 | 2018/09/22 07:00 | Sebastian Zapata v Ivan Zaytsev | 2-6,3-6 |
| ITF Austria F6 | 2018/08/06 08:30 | Ivan Zaytsev v Michael Weindl | 0-6,1-6 |
| ITF Austria F6 | 2018/08/05 10:35 | Keivon Tabrizi v Ivan Zaytsev | 4-6,6-3,5-7 |
| ITF Russia F4 Qual | 2018/07/29 07:00 | Ivan Mikhaylyuk v Ivan Zaytsev | 6-3,6-3 |
| ITF Lithuania F1 | 2018/07/21 13:00 | Ivan Zaytsev v Harrison Lombe | 2-6,2-6 |
| ITF Lithuania F1 | 2018/07/21 07:00 | Ivan Zaytsev v Masi Sarpola | 3-6,7-5,6-3 |