Stadium: Centre Court Round: 19 Ground: Clay
| ITF - M15 Héraklion | 2020/11/26 09:35 | Facundo Diaz Acosta v Adrian Andreev | 4-6,6-7 |
| Challenger - Prague | 2021/08/08 12:00 | Adrian Andreev v Aldin Setkic | 7-5,6-1 |
| Segovia, Spain | 2021/07/26 16:30 | Adrian Andreev v Benjamin Bonzi | 7-6,4-6,6-7 |
| Challenger Pozoblanco | 2021/07/21 15:00 | Adrian Andreev v Gregoire Barrere | 3-6,0-6 |
| Challenger Pozoblanco | 2021/07/19 19:45 | Adrian Andreev v Ruiz Romero, Blas | 6-0,6-0 |
| Iasi, Romania | 2021/07/14 08:00 | Lucas Miedler v Adrian Andreev | 7-6,6-1 |
| Iasi, Romania | 2021/07/12 09:20 | Adrian Andreev v Alexandre Muller | 6-4,1-6,6-3 |
| Braunchsweig, Germany | 2021/07/04 09:00 | Daniel Michalski v Adrian Andreev | 7-6,7-6 |
| Tulsa, Singles Main, M-ITF-USA-16A | 2021/06/16 16:30 | Adrian Andreev v Gonzalo Villanueva | 6-2,3-6,4-6 |
| Challenger - Prague | 2021/08/08 12:00 | Facundo Diaz Acosta v Matija Pecotic | 7-6,6-1 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/05 14:40 | Facundo Diaz Acosta v Maciej Rajski | 6-4,1-6,4-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/03 10:30 | Facundo Diaz Acosta v Wojcik, Yann | 6-3,7-6 |
| ITF M25 Denia | 2021/07/28 14:00 | Facundo Diaz Acosta v Gonzalez, Alejandro | 4-6,7-6,3-6 |
| Challenger Todi | 2021/07/12 18:30 | Pedro Cachin v Facundo Diaz Acosta | 6-3,6-4 |
| Braunchsweig, Germany | 2021/07/04 11:10 | Mats Rosenkranz v Facundo Diaz Acosta | 3-6,7-6,7-6 |
| ITF M25 Most | 2021/05/29 08:30 | Facundo Diaz Acosta v Franco Agamenone | 4-6,3-6 |
| ITF M25 Most | 2021/05/27 10:25 | Antoine Escoffier v Facundo Diaz Acosta | 7-5,3-6,3-6 |