Stadium: Center Court Round: 25 Ground: Hardcourt outdoor
| Challenger Shenzhen Qual | 2023/10/15 05:50 | Ye Cong Mo v Markos Kalovelonis | 6-2,6-2 |
| Challenger Guangzhou | 2023/09/10 03:55 | Bang Shuo Yin v Markos Kalovelonis | 6-2,6-3 |
| Challenger Shanghai | 2023/09/03 04:20 | Markos Kalovelonis v Hanwen Li | 6-3,3-6,1-6 |
| Challenger Zhangjiagang | 2023/08/27 07:10 | Colin Sinclair v Markos Kalovelonis | 6-4,6-1 |
| Challenger Zhuhai | 2023/08/21 03:00 | Shuichi Sekiguchi v Markos Kalovelonis | 7-6,2-6,6-4 |
| Challenger Zhuhai | 2023/08/20 05:00 | Cheng-Peng Hsieh v Markos Kalovelonis | 0-6,2-6 |
| ITF M25 Jakarta | 2023/08/15 02:30 | Markos Kalovelonis v S D Prajwal Dev | 6-7,3-6 |
| ITF M25 Jakarta | 2023/08/09 05:30 | Markos Kalovelonis v Mitsuki Wei Kang Leong | 3-6,4-6 |
| ITF M25 Heraklion | 2023/10/30 11:00 | Lior Goldenberg v Christos Antonopoulos | 7-6,6-1 |
| ITF M25 Heraklion | 2023/10/29 11:00 | Louis Van Herck v Christos Antonopoulos | 5-7,0-6 |
| ITF M15 Heraklion | 2023/10/22 08:30 | Christos Antonopoulos v Hamid Reza Nadaf | 5-7,3-6 |
| UTR Pro Sofia | 2023/09/10 05:00 | Tadija Radovanovic v Christos Antonopoulos | 6-4,4-6,0-6 |
| UTR Pro Sofia | 2023/09/09 05:00 | Christos Antonopoulos v Aniss Rafiq | 6-2,7-5 |
| UTR Pro Sofia | 2023/09/08 06:30 | Christos Antonopoulos v Petr Nesterov | 6-7,4-6 |
| UTR Pro Sofia | 2023/09/07 05:00 | Christos Antonopoulos v Enrique Bogo | 3-6,2-6 |
| UTR Pro Sofia | 2023/09/06 08:00 | Wadym Konowczuk v Christos Antonopoulos | 3-6,1-6 |