Stadion: Court 1 Round: 54 Ground: Hardcourt indoor
| ITF - M15 - Bratislava | 2021/03/03 16:55 | Piotr Grynkowski v Daniel Siniakov | 3-6,6-3,1-6 |
| ITF - M25 - Pardubice | 2023/09/20 11:35 | Daniel Siniakov v Maxim Mrva | 6-4,2-6,5-7 |
| ITF - M25 - Jablonec Nad Nisou | 2023/09/01 10:15 | Hynek Barton v Daniel Siniakov | 7-6,7-6 |
| ITF - M25 - Jablonec Nad Nisou | 2023/08/31 12:05 | Adam Jurajda v Daniel Siniakov | 6-7,5-7 |
| ITF - M25 - Jablonec Nad Nisou | 2023/08/30 09:50 | Daniel Siniakov v Andrew Paulson | 5-7,7-6,6-4 |
| Challenger - Prag | 2023/08/20 08:00 | Daniel Siniakov v Jaime Faria | 1-6,4-6 |
| ITF - M25 - Bielsko Biala | 2023/08/17 08:30 | Olaf Pieczkowski v Daniel Siniakov | 7-5,6-2 |
| ITF - M25 - Bielsko Biala | 2023/08/16 11:35 | Daniel Siniakov v Yshai Oliel | 6-3,2-6,7-5 |
| Challenger - Liberec | 2023/07/30 12:35 | Alex M Pujolras v Daniel Siniakov | 1-6,6-3,6-1 |
| ITF - M25 - Trnava | 2024/03/25 09:00 | Piotr Grynkowski v Juliusz Bienkiewicz | 6-4,6-1 |
| ITF - M25 - Łódź | 2023/08/09 17:00 | Piotr Grynkowski v Jiri Barnat | 3-6,3-6 |
| ITF - M25 - Łódź | 2023/08/08 11:05 | Piotr Grynkowski v Piotr Siekanowicz | 6-4,6-1 |
| ITF - M25 - Łódź | 2023/08/07 10:30 | Siim Troost v Piotr Grynkowski | 6-7,6-7 |
| ITF - M25 - Jablonec Nad Nisou | 2023/05/29 10:30 | Thijmen Loof v Piotr Grynkowski | 7-6,7-5 |
| ITF - M15 - Lodz | 2022/07/27 13:30 | Piotr Grynkowski v Petr Nouza | 1-6,3-6 |
| ITF - M15 - Lodz | 2022/07/26 13:30 | Federico Campana v Piotr Grynkowski | 3-6,4-6 |
| ITF - M15 - Kairo | 2022/01/12 08:00 | Daniel Michalski v Piotr Grynkowski | 6-1,6-1 |