Round: 44 Ground: Clay
| ITF Brasil F5 | 2018/10/14 14:00 | Felipe Garla v Lucas Gessner | 6-3,6-1 |
| ITF Portugal F11 - Clasificación | 2018/07/01 15:45 | Afonso Salgado v Lucas Gessner | 7-5,6-3 |
| ITF Portugal F10 | 2018/06/23 09:00 | Edoardo Graziani v Lucas Gessner | 6-0,6-0 |
| ITF Portugal F9 | 2018/06/17 09:00 | Lucas Gessner v Afonso Portugal | 2-6,0-6 |
| ITF Portugal F9 | 2018/06/16 11:30 | Miguel Semedo v Lucas Gessner | 6-2,3-6,6-7 |
| ITF Brasil F4 - Clasificación | 2018/05/13 12:00 | Gabriel Decamps v Lucas Gessner | 6-0,6-1 |
| ITF Brasil F4 - Clasificación | 2018/05/12 12:00 | Lucas Gessner v Eber Tiepermann | 6-1,6-3 |
| ITF Brasil F3 | 2018/05/06 12:30 | Lorenzo Gagliardo v Lucas Gessner | 6-2,6-3 |
| ITF Brasil F5 | 2018/10/14 13:00 | Joao Giannella v Gabriel De Andrade Bendazoli | 3-6,6-7 |
| ITF Brasil F4 - Clasificación | 2018/05/12 12:00 | Joao Giannella v Eduardo Ribeiro | 3-6,3-6 |
| ITF Brasil F3 | 2018/05/06 12:30 | Aaron Schmid v Joao Giannella | 6-1,7-5 |
| ITF Brasil F3 | 2018/05/05 12:30 | Joao Pedro Okano v Joao Giannella | 3-6,4-6 |
| ITF Brasil F2 | 2018/04/29 15:00 | Joao Giannella v Juan Bautista Otegui | 3-6,2-6 |
| ITF Brasil F2 | 2018/04/28 15:00 | Hugo Moura v Joao Giannella | 4-6,6-2,4-6 |
| ITF Egipto F13 | 2018/04/07 10:30 | Joao Giannella v Bogdan Didenko | 3-6,7-6,5-7 |
| ITF Egipto F12 | 2018/04/01 10:30 | Teymuraz Gabashvili v Joao Giannella | 6-2,6-0 |