Stadium: Cancha Central Round: 24 Ground: Clay
| Challenger Columbus | 2019/01/08 16:00 | Joao Souza v Goncalo Oliveira | 4-6,1-6 |
| Challenger Orlando | 2019/01/01 15:00 | Joao Souza v Dennis Novikov | 3-6,2-6 |
| Challenger Orlando | 2018/12/31 17:50 | Jared Hiltzik v Joao Souza | 6-2,5-7,1-6 |
| ITF Brazil F9 | 2018/11/17 13:00 | Joao Souza v Alex Blumenberg | 6-3,6-1 |
| ITF Brazil F9 | 2018/11/16 15:55 | Joao Souza v Joao Lucas Reis da Silva | 6-4,5-7,6-4 |
| ITF Brazil F9 | 2018/11/15 18:30 | Joao Souza v Joao Pedro Okano | 6-2,6-1 |
| ITF Brazil F9 | 2018/11/13 18:00 | Joao Souza v Mateus Alves | 6-4,7-6 |
| ITF Brazil F8 | 2018/11/11 13:00 | Christian Lindell v Joao Souza | 1-6,6-7 |
| ITF M15 Monastir | 2019/01/15 10:15 | Luca Giacomini v Preston Brown | 6-2,6-3 |
| ITF M15 Monastir | 2019/01/08 08:45 | Hendrik Jebens v Preston Brown | 6-3,6-0 |
| ITF M15 Monastir | 2019/01/07 15:00 | Preston Brown v Tobias Brutscher | 6-1,6-2 |
| ITF Dominican Republic F2 | 2018/12/03 13:00 | Baker Newman v Preston Brown | 6-2,6-4 |
| ITF Dominican Republic F2 | 2018/12/02 15:00 | Sebastian Eguez v Preston Brown | 3-6,1-6 |
| ITF Dominican Republic F2 | 2018/12/01 18:00 | Felipe Santamaria v Preston Brown | 5-7,6-2,0-6 |
| ITF Mozambique F2 | 2018/11/12 09:35 | Tyler Lu v Preston Brown | 6-7,6-3,6-4 |
| ITF Mozambique F2 | 2018/11/11 09:00 | Armando Sigauque v Preston Brown | 0-6,0-6 |