Ground: Hardcourt outdoor
| UTR Pro Beograd | 2023/10/08 09:00 | Christos Keisidis v Domagoj Biljesko | 4-6,0-6 |
| UTR Pro Beograd | 2023/10/04 08:44 | Christos Keisidis v Ilya Snitari | 2-6,0-6 |
| UTR Pro Beograd | 2023/10/03 07:30 | Christos Keisidis v Drazen Petrovic | 2-6,5-7 |
| UTR Pro Beograd | 2023/10/02 06:00 | Christos Keisidis v Zoran Ludoski | 4-6,6-7 |
| UTR Pro Olomouc | 2023/09/17 07:30 | Mikolaj Lis v Christos Keisidis | 1-6,3-6 |
| UTR Pro Olomouc | 2023/09/16 10:52 | Christos Keisidis v Jakub Novak | 6-4,7-6 |
| UTR Pro Olomouc | 2023/09/15 06:00 | Christos Keisidis v Oleg Prihodko | 1-6,1-6 |
| UTR Pro Olomouc | 2023/09/13 06:00 | Dominik Recek v Christos Keisidis | 6-2,6-1 |
| ITF M15 Vienna | 2023/08/28 10:30 | Peter Goldsteiner v Vojtech Vlkovsky | 6-3,3-6,11-13 |
| ITF M15 Vienna | 2023/08/27 10:30 | Peter Goldsteiner v Nick Ihlenfeld | 6-1,6-2 |
| ITF M15 Kottingbrunn | 2023/08/17 08:00 | Peter Goldsteiner v David Pichler | 3-6,2-6 |
| ITF M15 Kottingbrunn | 2023/08/15 10:10 | Peter Benjamin Privara v Peter Goldsteiner | 3-6,3-6 |
| ITF M15 Kottingbrunn | 2023/08/14 12:00 | Peter Goldsteiner v Mariano Tammaro | 1-6,4-6 |
| ITF M15 Kottingbrunn | 2023/08/14 08:00 | Peter Goldsteiner v Kris Krawcewicz | 6-3,7-6 |
| ITF M25 Lodz | 2023/08/07 13:30 | Peter Goldsteiner v Maciej Kos | 6-3,4-6,6-10 |
| ITF M25 Lodz | 2023/08/07 07:30 | Peter Goldsteiner v Tomas Zlatohlavek | 6-2,7-6 |