Stadion: Court 1 Round: 25 Ground: Hardcourt outdoor
| Challenger - Kobe | 2023/11/14 01:30 | Duje Ajdukovic v Menelaos Efstathiou | 6-2,6-2 |
| Challenger - Matsuyama | 2023/11/07 01:00 | Bu Yunchaokete v Menelaos Efstathiou | 6-7,6-2,6-2 |
| Challenger - Bergamo | 2023/10/29 18:40 | Billy Harris v Menelaos Efstathiou | 6-1,6-1 |
| Challenger - Ortisei | 2023/10/24 17:15 | Abedallah Shelbayh v Menelaos Efstathiou | 6-1,6-2 |
| ITF - M15 - Monastir | 2023/10/11 12:40 | Kai Wehnelt v Menelaos Efstathiou | 6-1,6-2 |
| ITF - M15 - Monastir | 2023/10/06 10:30 | Constantin Bittoun Kouzmine v Menelaos Efstathiou | 6-1,6-2 |
| ITF - M15 - Monastir | 2023/10/05 09:50 | Menelaos Efstathiou v Alexandros Skorilas | 7-5,6-4 |
| ITF - M15 - Monastir | 2023/10/03 10:15 | Menelaos Efstathiou v Aleksandr Lobanov | 5-7,7-5,6-2 |
| ITF - M25 - Netanya | 2023/06/26 09:20 | Constantinos Koshis v Emile Hudd | 6-7,6-7 |
| ITF - M25 - Netanya | 2023/06/25 08:00 | Constantinos Koshis v Tom Sorin | 7-5,6-1 |
| ITF - M25 - Netanya | 2023/06/19 12:00 | Constantinos Koshis v Fons Van Sambeek | 0-6,3-6 |
| ITF - M15 - Ithaca | 2022/11/02 14:00 | Constantinos Koshis v Mwendwa Mbithi | 3-6,2-6 |
| ITF - M15 - Norman | 2022/10/26 17:00 | Alex Martinez v Constantinos Koshis | 6-2,6-1 |
| ITF - M15 - Albuquerque | 2022/09/27 16:00 | Osgar O'Hoisin v Constantinos Koshis | 6-2,6-1 |
| ITF - M15 - Lubbock | 2022/09/21 17:00 | Jordan Hasson v Constantinos Koshis | 6-3,6-3 |
| ITF - M25 - Martos | 2022/06/13 07:00 | Ignasi De Rueda De Genover v Constantinos Koshis | 6-2,6-0 |