Stadium: Court 7 Round: 25 Ground: Clay
| ITF Brazil F1 | 2018/04/23 14:00 | Christian Oliveira v Gonzalo Villanueva | 7-5,3-6,0-6 |
| ITF M15 Eupen | 2019/08/11 13:00 | Michael Geerts v Gonzalo Villanueva | 4-6,1-6 |
| ITF M15 Eupen | 2019/08/10 12:15 | Genaro Alberto Olivieri v Gonzalo Villanueva | 2-6,6-7 |
| ITF M15 Eupen | 2019/08/09 13:40 | Daniel De Jonge v Gonzalo Villanueva | 6-4,1-6,0-6 |
| ITF M15 Eupen | 2019/08/08 14:05 | Gauthier Onclin v Gonzalo Villanueva | 7-5,2-6,6-7 |
| ITF M15 Eupen | 2019/08/06 15:00 | Colin Van Beem v Gonzalo Villanueva | 3-6,4-6 |
| ITF M15 Brussels | 2019/08/02 09:00 | Jesper De Jong v Gonzalo Villanueva | 2-6,6-3,6-4 |
| ITF M15 Brussels | 2019/08/01 10:20 | Gauthier Onclin v Gonzalo Villanueva | 6-4,2-6,3-6 |
| ITF M15 Brussels | 2019/07/31 10:00 | Daniel De Jonge v Gonzalo Villanueva | 3-6,1-6 |
| ITF M15 Lambare | 2019/08/20 14:00 | Christian Oliveira v Bruno Britez | 6-4,7-6 |
| ITF M15 Lambare | 2019/08/19 14:00 | Christian Oliveira v Vicente M R Maturana | 6-2,7-5 |
| ITF M15 Curitiba | 2019/06/27 19:40 | Christian Oliveira v Juan Pablo Ficovich | 1-6,2-6 |
| ITF M15 Curitiba | 2019/06/25 19:55 | Christian Oliveira v Aaron Schmid | 6-2,6-3 |
| ITF M15 Sao JDR Preto | 2019/06/21 15:40 | Juan Pablo Ficovich v Christian Oliveira | 6-1,6-1 |
| ITF M15 Sao JDR Preto | 2019/06/20 16:55 | Christian Oliveira v Maximiliano Estevez | 6-3,7-5 |
| ITF M15 Sao JDR Preto | 2019/06/19 22:55 | Christian Oliveira v Mateus Alves | 7-6,6-1 |
| ITF M15 Sao JDR Preto | 2019/06/18 12:30 | Christian Oliveira v Boruch Skierkier | 6-0,6-1 |