Stadium: Pernerka Court Round: 19 Ground: Clay
| Challenger - Liberec | 2021/08/01 16:30 | Geoffrey Blancaneaux v Daniel Siniakov | 2-6,3-6 |
| ITF M15 Poprad | 2021/07/06 07:55 | Illya Beloborodko v Daniel Siniakov | 3-6,7-6,7-5 |
| ITF M15 Poprad | 2021/07/05 08:00 | Calin Manda v Daniel Siniakov | 3-6,0-6 |
| ITF M15 Poprad | 2021/07/04 11:00 | Lukas Pokorny v Daniel Siniakov | 6-2,4-6,5-10 |
| ITF M25 - Wrocław | 2021/06/29 08:00 | Daniel Siniakov v Illya Beloborodko | 6-4,4-6,6-10 |
| ITF M25 - Wrocław | 2021/06/28 11:00 | Ignacio Monzon v Daniel Siniakov | 3-6,6-4,7-10 |
| ITF M25 - Wrocław | 2021/06/27 15:30 | Kamil Gajewski v Daniel Siniakov | 2-6,5-7 |
| Challenger - Prostejov | 2021/06/15 08:30 | Daniel Siniakov v Sebastian Baez | 1-6,0-6 |
| Challenger - Liberec | 2021/08/01 12:30 | David Vega Hernandez v Thomaz Bellucci | 6-3,3-6,6-3 |
| ITF M15 - Telde | 2019/11/27 10:00 | David Vega Hernandez v Ricardo Ojeda Lara | 3-6,1-6 |
| ITF M15 - Telde | 2019/11/26 11:30 | David Vega Hernandez v Pawel Juszczak | 6-4,6-1 |
| Challenger - Sevilla | 2019/09/10 08:00 | David Vega Hernandez v Laurent Lokoli | 3-6,5-7 |
| Challenger - Sevilla | 2019/09/09 09:00 | Alejandro Gonzalez v David Vega Hernandez | 4-6,7-6,4-6 |
| Challenger L'Aquila | 2019/08/19 08:00 | Cristian Rodriguez v David Vega Hernandez | 6-7,6-4,7-5 |
| Challenger - Tunis | 2019/04/16 09:00 | David Vega Hernandez v Tomislav Brkic | 3-6,1-6 |
| Challenger - Tunis | 2019/04/15 09:00 | David Vega Hernandez v Sander Gille | 6-7,6-3,6-4 |