| Challenger - Concepción | 01/17 20:55 | 25 | [409] Gonzalo Villanueva v Andrej Martin [116] | 6-2,6-3 | |
| Challenger - Blumenau | 01/14 17:30 | 27 | [419] Gonzalo Villanueva v Juan Pablo Paz [437] | 3-6,4-6 | |
| Challenger - Blumenau | 01/12 14:30 | 26 | [419] Gonzalo Villanueva v Ignacio Carou [418] | 1-6,6-1,6-2 | |
| Challenger - Blumenau | 01/11 13:00 | 25 | [324] Carlos Gimeno Valero v Gonzalo Villanueva [419] | 6-0,3-6,1-6 | |
| Challenger - Buenos Aires | 01/07 14:30 | 27 | [436] Gonzalo Villanueva v Facundo D Acosta [338] | 3-6,2-6 | |
| Challenger - Buenos Aires | 01/06 17:30 | 26 | [313] Genaro A Olivieri v Gonzalo Villanueva [436] | 4-6,1-6 | |
| Challenger - Buenos Aires | 01/04 18:25 | 25 | Gonzalo Villanueva v Alec Deckers | 7-6,6-4 | |
| Challenger - Rio de Janeiro | 12/13 16:00 | 25 | [437] Gonzalo Villanueva v Kaichi Uchida [319] | 3-6,4-6 | |
| Challenger - Florianopolis | 12/09 13:00 | 26 | [146] Nicolas Barrientos v Gonzalo Villanueva [450] | 7-6,6-1 | |
| Challenger - Florianopolis | 12/07 16:05 | 25 | Pedro B Dias v Gonzalo Villanueva | 6-4,5-7,2-6 | |
| Challenger - Sao Paulo | 11/30 16:55 | 25 | [349] Facundo D Acosta v Gonzalo Villanueva [460] | 7-5,6-1 | |
| Challenger - Sao Paulo | 11/29 15:05 | 19 | [460] Gonzalo Villanueva v Alejandro Gomez [483] | 6-4,7-6 | |
| Challenger - Sao Paulo | 11/28 13:00 | 14 | Gonzalo Villanueva v Tomas Lipovsek Puches | 3-6,6-3,6-1 | |
| Challenger - Brasilien | 11/21 14:35 | 14 | [453] Gonzalo Villanueva v Luca Castelnuovo [332] | 6-7,6-3,3-6 | |
| Challenger - Campinas | 11/14 16:00 | 26 | [338] Hernan Casanova v Gonzalo Villanueva [450] | 7-6,4-6,7-5 | |
| Challenger - Montevideo | 11/09 16:00 | 25 | [78] Facundo Bagnis v Gonzalo Villanueva [450] | 6-1,7-6 | |
| Challenger - Montevideo | 11/08 16:30 | 19 | Tomas Lipovsek Puches v Gonzalo Villanueva | 3-6,2-6 | |
| Challenger - Montevideo | 11/07 18:05 | 14 | Rodrigo Arus v Gonzalo Villanueva | 1-6,0-6 | |
| Challenger - Lima | 10/27 16:00 | 26 | [145] Marcelo Tomas Barrios Vera v Gonzalo Villanueva [483] | 7-5,6-1 | |
| Challenger - Lima | 10/26 15:00 | 25 | [188] Dimitar Kuzmanov v Gonzalo Villanueva [483] | 5-7,1-6 | |
| Challenger - Lima | 10/25 16:30 | - | [425] Cristian Rodriguez v Gonzalo Villanueva [483] | 7-6,3-6,2-6 | |
| Challenger - Lima | 10/24 20:25 | 26 | Gonzalo Bueno v Gonzalo Villanueva | 1-6,7-6,4-6 | |
| ITF - M25 - Lima | 10/15 15:00 | 27 | Gonzalo Villanueva v Jonathan Mridha | 5-7,6-7 | |
| ITF - M25 - Lima | 10/14 19:15 | 26 | Gonzalo Villanueva v Franco Roncadelli | 6-2,6-2 | |
| ITF - M25 - Lima | 10/12 15:00 | 25 | [478] Gonzalo Villanueva v Luca Castelnuovo [341] | 4-6,6-4,6-4 | |
| ITF - M25 - Lima | 10/06 18:55 | 25 | Wilson Leite v Gonzalo Villanueva | 6-3,6-4 | |
| Challenger - Lima | 09/26 18:20 | 14 | Jean Thirouin v Gonzalo Villanueva | 6-3,1-6,6-1 | |
| Challenger - Ambato | 09/19 15:00 | 14 | [448] Gonzalo Villanueva v Luca Castelnuovo [328] | 6-7,6-7 | |
| Challenger - Quito | 09/14 15:00 | 25 | [448] Gonzalo Villanueva v Renzo Olivo [207] | 4-6,4-6 | |
| Challenger - Tulln | 09/06 08:00 | 19 | [390] Neil Oberleitner v Gonzalo Villanueva [437] | 7-5,6-2 |
Gonzalo Villanueva (* 13. Januar 1995 in Paraná) ist ein argentinischer Tennisspieler.