Stadium: Court 7 Round: 27 Ground: Clay
| ITF M25 Telfs | 2023/07/20 09:45 | Peter Heller v Ondrej Horak | 6-1,6-1 |
| ITF M25 Telfs | 2023/07/18 10:00 | Peter Heller v Niklas Schell | 6-3,6-1 |
| ITF M15 Antalya | 2023/04/21 07:30 | Viacheslav Bielinskyi v Peter Heller | 6-7,6-0,6-3 |
| ITF M15 Antalya | 2023/04/20 07:00 | Atakan Karahan v Peter Heller | 1-6,0-6 |
| ITF M15 Antalya | 2023/04/19 07:00 | Marsel Ilhan v Peter Heller | 5-7,1-6 |
| ITF M15 Antalya | 2023/04/05 09:55 | Michel Hopp v Peter Heller | 1-6,4-6 |
| ITF M15 Antalya | 2023/04/01 09:55 | Peter Heller v Cezar Cretu | 4-6,4-6 |
| ITF M15 Antalya | 2023/03/31 11:05 | Peter Heller v Mirko Martinez | 6-1,6-7,6-2 |
| ITF M25 Telfs | 2023/07/20 08:30 | Daniel Siniakov v Juan Bautista Otegui | 2-6,6-3,6-3 |
| ITF M25 Telfs | 2023/07/19 10:00 | Daniel Siniakov v Timofey Stepanov | 4-6,6-3,6-0 |
| ITF M25 Kassel | 2023/07/12 11:25 | Daniel Siniakov v Facundo Yunis | 4-6,1-6 |
| ITF M25 Kassel | 2023/07/11 09:30 | Daniel Siniakov v Taym Alazmeh | 6-3,7-6 |
| ITF M25 Kassel | 2023/07/10 08:00 | Daniel Siniakov v Vojtech Mares | 7-5,6-4 |
| ITF M25 Marburg | 2023/07/04 15:00 | Daniel Siniakov v Max Wiskandt | 2-6,4-6 |
| Challenger Prostejov | 2023/06/04 13:00 | Roman Andres Burruchaga v Daniel Siniakov | 7-5,7-5 |
| ITF M25 Jablonec Nad Nisou | 2023/05/31 11:50 | Daniel Siniakov v Stuart Parker | 0-6,2-6 |