Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Idanha-A-Nova MD | 2021/07/16 11:50 | Fancutt/Hoyt v Klier Junior/Joao Lucas Reis da Silva | 7-5,6-2 |
| ITF M25 Idanha-A-Nova MD | 2021/07/15 15:00 | Klier Junior/Joao Lucas Reis da Silva v Cabral/Vale | 3-6,7-6,12-10 |
| ITF M25 Idanha-A-Nova MD | 2021/07/13 16:00 | Klier Junior/Joao Lucas Reis da Silva v Atlangeriev/Matusevich | 6-4,7-5 |
| ITF M15 Sarajevo MD | 2021/06/05 13:20 | Biljesko/Nincevic v Klier Junior/Joao Lucas Reis da Silva | 6-2,3-6,10-4 |
| ITF M15 Sarajevo MD | 2021/06/04 13:10 | Madarasz/Velcz v Klier Junior/Joao Lucas Reis da Silva | 4-6,4-6 |
| ITF - M15 Brcko - Doubles Hommes | 2021/05/23 11:40 | Klier Junior/Joao Lucas Reis da Silva v Vanshelboim/Virtanen | 6-2,0-6,11-9 |
| ITF - M15 Brcko - Doubles Hommes | 2021/05/22 10:40 | Klier Junior/Joao Lucas Reis da Silva v Biljesko/Heger | 6-7,7-5,10-3 |
| ITF - M15 Brcko - Doubles Hommes | 2021/05/21 16:25 | Klier Junior/Joao Lucas Reis da Silva v Connor/Jovic | 6-2,6-1 |
| ITF M25 Idanha-A-Nova MD | 2021/07/14 16:40 | Araujo P / Coelho F v David Marrero/Mulye | 6-3,6-4 |
| ITF M15 Santo Domingo MD | 2020/12/08 19:00 | David Marrero/Mulye v Bertran/Vance | 6-4,1-6,3-10 |
| ITF M15 Santo Domingo MD | 2020/12/02 18:30 | David Marrero/Mulye v Butsch J / Stalder R | 2-6,3-6 |
| Loule, Doubles M-ITF-POR-03A | 2020/03/11 15:50 | Roncalli S / Sorrentino L v David Marrero/Mulye | 6-0,7-5 |
| Faro, Doubles M-ITF-POR-02A | 2020/03/04 14:15 | Dembek M / Falcao G v David Marrero/Mulye | 4-6,6-4,10-5 |
| Vale Do Lobo, Doubles M-ITF-POR-01A | 2020/02/26 17:05 | Bonadio R / Bortolotti M v David Marrero/Mulye | 6-1,6-0 |
| ITF - M15 Manacor - Doubles Hommes | 2020/01/14 12:10 | David Marrero/Mulye v Haerteis J / Heller P | 0-6,2-6 |
| ITF - M15 Manacor - Doubles Hommes | 2020/01/08 13:30 | Guenther V / Rosenkranz M v David Marrero/Mulye | 6-1,6-4 |