| UTR Pro Tennis Series Bucharest | 2021/05/30 10:00 | Ihor Dudun v Marcelo Zormann | 1-6,0-6 |
| ITF Germany F10 | 2018/08/01 12:30 | Tejas Chaukulkar v Marcelo Zormann | 6-1,7-5 |
| ITF Germany F9 | 2018/07/25 11:35 | Marcelo Zormann v Louroi Martinez | 4-6,6-4,1-6 |
| ITF Germany F9 | 2018/07/24 12:20 | Marcelo Zormann v Ondrej Krstev | 6-4,6-1 |
| ITF Germany F8 | 2018/07/18 13:00 | Elmar Ejupovic v Marcelo Zormann | 6-4,6-4 |
| ITF Netherlands F3 | 2018/07/10 13:45 | Marcelo Zormann v Tom Farquharson | 7-6,5-7,5-7 |
| ITF Brazil F4 | 2018/05/15 20:00 | Marcelo Zormann v Thiago Seyboth Wild | 3-6,6-4,3-6 |
| ITF Brazil F3 | 2018/05/13 13:30 | Oscar Jose Gutierrez v Marcelo Zormann | 6-2,6-2 |
| UTR Pro Tennis Series Bucharest | 2021/06/02 12:00 | Ihor Dudun v Warren Sinius | 4-6,0-6 |
| UTR Pro Tennis Series Bucharest | 2021/05/30 13:00 | Mihai Razvan Marinescu v Warren Sinius | 6-4,6-1 |
| ITF M15 Marbella | 2021/05/23 12:30 | Jose Dominguez Alonso v Warren Sinius | 6-2,2-6,10-6 |
| UTR Pro Tennis Series Barcelona | 2021/05/01 11:00 | Warren Sinius v Fermin Calvo Barcelo | 0-6,0-5 |
| UTR Pro Tennis Series Barcelona | 2021/04/30 12:30 | Kuzey Cekirge v Warren Sinius | 5-7,6-0,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/04/29 10:00 | Thomas Laurent v Warren Sinius | 6-1,5-1 |
| ITF M15 Poitiers | 2021/03/15 11:10 | Warren Sinius v Hugo Voljacques | 0-6,0-6 |
| ITF M15 Poitiers | 2021/03/14 12:30 | Warren Sinius v Nicolas Tepmahc | 6-1,6-7,10-5 |