| 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 |
| ITF M15 Marbella | 2021/05/30 09:00 | Diego F Flores v Yannick Mertens | 2-6,1-6 |
| ITF M15 Marbella | 2021/05/29 10:35 | Roman Andres Burruchaga v Diego F Flores | 4-6,6-3,3-6 |
| ITF M15 Marbella | 2021/05/28 09:45 | Antoine Bellier v Diego F Flores | 6-7,3-6 |
| ITF M15 Marbella | 2021/05/27 07:30 | Fouad Behbehani v Diego F Flores | 0-6,0-6 |
| ITF M15 Marbella | 2021/05/26 07:30 | Diego F Flores v Mateus Alves | 7-6,7-6 |
| ITF M15 Marbella | 2021/05/25 07:30 | Diego F Flores v Jose Joaquin M Cisneros | 6-2,6-4 |
| ITF M15 Marbella | 2021/05/24 08:00 | Diego F Flores v Jim Walder | 6-4,7-5 |
| ITF M15 Marbella | 2021/05/23 08:00 | Diego F Flores v Ignacio B Alia | 6-2,6-2 |