Stadium: Campo Centrale Round: 46 Ground: Clay
| ATP Miami Qual | 2018/03/19 15:35 | Ruben Bemelmans v Joao Souza | 7-5,6-3 |
| Challenger Santiago | 2018/03/06 17:50 | Joao Souza v Carlos Gomez-Herrera | 3-6,1-6 |
| Challenger Santiago Qual | 2018/03/05 14:00 | Joao Souza v Pedro Cachin | 5-7,6-7 |
| Challenger Santiago Qual | 2018/03/04 15:50 | Joao Souza v Victor Nunez | 6-2,6-1 |
| Challenger Santiago Qual | 2018/03/03 17:40 | Joao Souza v Martin Cuevas | 6-3,2-6,6-4 |
| ATP Rio De Janeiro Qual | 2018/02/17 20:45 | Carlos Berlocq v Joao Souza | 6-1,7-5 |
| ATP Buenos Aires Qual | 2018/02/10 14:00 | Joao Souza v Gastao Elias | 6-4,3-6,0-6 |
| ATP Quito Qual | 2018/02/04 18:45 | Facundo Bagnis v Joao Souza | 6-3,6-4 |
| ITF Bahrain F1 | 2018/03/21 12:00 | Claudio Fortuna v Dominik Kellovsky | 6-7,3-6 |
| ITF Bahrain F1 | 2018/03/20 11:00 | Claudio Fortuna v Alexander Gornet | 6-0,7-6 |
| ITF Qatar F3 | 2018/03/13 14:55 | Claudio Fortuna v Benjamin Hassan | 5-7,6-4,3-6 |
| ITF Tunisia F6 | 2018/02/16 09:00 | Johan Sebastien Tatlot v Claudio Fortuna | 6-3,6-1 |
| ITF Tunisia F6 | 2018/02/15 09:00 | Claudio Fortuna v Alen Avidzba | 6-3,6-2 |
| ITF Tunisia F6 | 2018/02/13 12:00 | Claudio Fortuna v Pietro Mugelli | 6-0,6-0 |
| ITF Tunisia F5 | 2018/02/08 10:30 | Claudio Fortuna v Carlos Boluda-Purkiss | 3-6,5-7 |
| ITF Tunisia F5 | 2018/02/07 13:50 | Eduardo Dischinger v Claudio Fortuna | 6-3,5-7,3-6 |