Stadium: Court 6 Round: 44 Ground: Hardcourt outdoor
| ITF M15 - Setubal | 2020/10/09 11:50 | Joao Lucas Reis da Silva v Sebastian Fanselow | 6-7,3-6 |
| ITF M15 - Setubal | 2020/10/08 08:55 | Luke Johnson v Joao Lucas Reis da Silva | 2-6,6-7 |
| ITF M15 - Setubal | 2020/10/07 11:00 | Joao Lucas Reis da Silva v Dan Added | 4-6,6-4,6-4 |
| ITF M15 - Setubal | 2020/10/05 13:00 | Joao Lucas Reis da Silva v Eero Vasa | 3-6,7-5,11-9 |
| ITF M15 - Setubal | 2020/10/05 09:00 | Joao Lucas Reis da Silva v Igor Marcondes | 3-6,7-5,10-4 |
| ITF M25 - Porto | 2020/09/28 15:00 | Igor Marcondes v Joao Lucas Reis da Silva | 2-6,6-3,10-6 |
| ITF M25 - Porto | 2020/09/27 13:30 | Tom Hands v Joao Lucas Reis da Silva | 3-6,4-6 |
| ITF M15 - Castelo Branco | 2020/09/25 10:40 | Joao Lucas Reis da Silva v Strong Kirchheimer | 6-3,6-7,2-6 |
| ITF M15 - Loule | 2020/03/08 10:00 | Guilherme Sousa Severin v Marvin Moeller | 0-6,0-6 |
| ITF M15 - Faro | 2020/03/01 11:30 | Andre Rodeia v Guilherme Sousa Severin | 6-3,6-0 |
| ITF M15 - Vale Do Lobo | 2020/02/24 10:30 | Miguel Damas v Guilherme Sousa Severin | 7-5,6-2 |
| ITF Portugal F3 Qual | 2017/03/11 13:00 | Jose Von Hafe Perez v Guilherme Sousa Severin | 6-2,6-0 |