Round: 62 Ground: Hardcourt outdoor
| ITF Brazil F3 | 2018/05/05 12:30 | Franco Roncadelli v Felipe Muzzi | 6-3,5-7,3-6 |
| Challenger Montevideo Qual | 2017/11/04 16:45 | Roberto Marcora v Franco Roncadelli | 6-3,6-2 |
| ITF Uruguay F3 Qual | 2016/12/10 17:00 | Franco Roncadelli v Alexis Gurmendi | 2-6,0-6 |
| ITF Brazil F3 | 2018/05/07 12:30 | Felipe Garla v Igor Sao Thiago | 6-4,4-6,7-5 |
| ITF Brazil F3 | 2018/05/06 12:30 | Joao M Nusdeo v Igor Sao Thiago | 3-6,3-6 |
| ITF Brazil F2 | 2018/04/29 15:00 | Alex Blumenberg v Igor Sao Thiago | 6-4,5-7,6-4 |
| ITF Brazil F1 | 2018/04/22 15:30 | Gustavo De O Cruz v Igor Sao Thiago | 6-4,5-7,6-1 |
| ITF Portugal F8 | 2018/04/18 12:10 | Igor Sao Thiago v Miliaan Niesten | 1-6,3-6 |
| ITF Portugal F8 Qual | 2018/04/16 09:30 | Goncalo Falcao v Igor Sao Thiago | 6-4,6-1 |
| ITF Portugal F8 Qual | 2018/04/15 09:00 | Andre Rodeia v Igor Sao Thiago | 1-6,5-7 |
| ITF Portugal F3 | 2018/03/05 14:00 | Igor Sao Thiago v Jose-Ricardo Nunes | 1-6,4-6 |