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