Stadium: Court 1 Round: 62 Ground: Clay
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/17 09:20 | Prechtel, Sebastian v Adan Freire Da Silva | 6-2,6-2 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/16 07:30 | Adan Freire Da Silva v Luigi Castelletti | 4-6,6-4,10-3 |
| ITF - M15 Poitiers | 2021/03/14 11:45 | Adan Freire Da Silva v Joffrey De Schepper | 6-7,6-7 |
| ITF - M25 Vale Do Lobo | 2021/03/07 11:00 | Adan Freire Da Silva v Goncalo Falcao | 2-6,3-6 |
| ITF - M25 Faro | 2021/02/28 10:00 | Adan Freire Da Silva v Cabral, Francisco | 3-6,3-6 |
| ITF - M15 Bressuire | 2021/01/17 08:30 | Valentin Lapalu v Adan Freire Da Silva | 6-3,6-1 |
| ITF M15 Quinta Do Lago | 2020/11/02 10:00 | Baltensperger, Raphael v Adan Freire Da Silva | 7-5,6-4 |
| ITF M15 Quinta Do Lago | 2020/11/01 10:00 | Simoes, Martim v Adan Freire Da Silva | 2-6,1-6 |
| ITF M25 Most | 2021/05/23 14:00 | Krystof Zapsky v Daniel Siniakov | 4-6,3-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/19 08:00 | Vitaliy Sachko v Daniel Siniakov | 4-6,6-3,6-4 |
| ITF M25 Prague | 2021/05/09 08:30 | Daniel Siniakov v Beran, Jakub | 5-7,4-6 |
| ITF - M15 Antalya | 2021/04/25 07:00 | Daniel Siniakov v Dan Alexandru Tomescu | 1-6,1-6 |
| ITF - M15 Antalya | 2021/04/21 08:45 | Paul Woerner v Daniel Siniakov | 6-4,6-3 |
| ITF - M15 Antalya | 2021/04/20 07:00 | Vernier, Michel v Daniel Siniakov | 0-6,7-6,4-10 |
| ITF - M15 Antalya | 2021/04/19 07:00 | Daniel Siniakov v Kim, Cheong-Eui | 6-4,3-6,11-9 |
| ITF - M15 Antalya | 2021/04/18 07:00 | Daniel Siniakov v Leon Benedict | 6-2,6-1 |