Stadium: Quadra 4 Round: 62 Ground: Clay
| ITF Brazil F4 Qual | 2018/05/14 13:00 | Costa, Fabio v Mateo Barreiros Reyes | 4-6,2-6 |
| ITF Brazil F3 | 2018/05/06 12:30 | Costa, Fabio v Muzzi, Felipe | 6-4,7-6 |
| ITF Brazil F2 | 2018/04/29 15:00 | Francisco Comesana v Costa, Fabio | 7-6,6-1 |
| ITF Brazil F1 | 2018/04/22 15:30 | Bendazoli, Gabriel v Costa, Fabio | 6-2,6-3 |
| ITF USA F6 | 2018/01/28 15:00 | Belov, Sergey v Costa, Fabio | 6-4,6-4 |
| ITF USA F6 | 2018/01/27 17:30 | Bencic, Brian v Costa, Fabio | 2-6,3-6 |
| ITF USA F5 | 2018/01/19 16:00 | Fainblum, Daniel v Costa, Fabio | 6-4,6-2 |
| ITF USA F3 Qual | 2018/01/06 16:00 | Costa, Fabio v Bryde, Trent | 6-7,2-6 |
| ITF Brazil F7 | 2018/10/28 12:30 | Okano, Joao Pedro v Lima, Enrico Dos Santos | 6-0,6-1 |
| ITF Brazil F6 | 2018/10/20 15:30 | Schmitz Frederico, Leonardo v Okano, Joao Pedro | 6-4,6-0 |
| ITF Brazil F5 | 2018/10/16 16:45 | Santos, Nicolas v Okano, Joao Pedro | 6-1,6-1 |
| ITF Brazil F5 | 2018/10/15 14:00 | Okano, Joao Pedro v Lima, Enrico Dos Santos | 6-4,6-2 |
| ITF Brazil F5 | 2018/10/13 17:00 | Eduardo Ribeiro v Okano, Joao Pedro | 5-7,3-6 |
| ITF Brazil F4 Qual | 2018/05/12 12:00 | Rafael Tosetto v Okano, Joao Pedro | 6-3,3-6,6-0 |
| ITF Brazil F3 | 2018/05/05 12:30 | Okano, Joao Pedro v Giannella, Joao | 3-6,4-6 |
| Turkey F12, Singles Qualifying | 2018/03/24 06:30 | Okano, Joao Pedro v Morck, Felix | 3-6,4-6 |