| Challenger Houston | 11/12 22:25 | 24 | [466] Rafael Matos v Gonzalo Villanueva [411] | 6-7,4-6 | |
| Challenger Montevideo | 11/04 19:20 | 24 | [408] Gonzalo Villanueva v Rafael Matos [469] | 6-4,0-6,2-6 | |
| Challenger Guayaquil | 10/29 16:00 | 25 | [406] Gonzalo Villanueva v Pedro Sousa [127] | 2-6,2-6 | |
| Challenger Guayaquil | 10/28 20:10 | 24 | Gonzalo Villanueva v Antonio Cayetano March | 6-4,6-3 | |
| Challenger Lima | 10/21 19:50 | 24 | [231] Pedja Krstin v Gonzalo Villanueva [409] | 6-3,6-0 | |
| Challenger Santo Domingo | 10/08 23:00 | 25 | [401] Gonzalo Villanueva v Hugo Dellien [83] | 2-6,3-6 | |
| Challenger Santo Domingo | 10/07 19:00 | 24 | [401] Gonzalo Villanueva v Andres Molteni [66] | 4-6,6-4,6-2 | |
| Challenger Campinas | 10/02 15:20 | 25 | [387] Gonzalo Villanueva v Alejandro Tabilo [231] | 0-6,3-6 | |
| Challenger Campinas | 10/01 13:00 | 24 | [387] Gonzalo Villanueva v Fernando Romboli [108] | 6-2,6-2 | |
| Challenger Buenos Aires | 09/24 14:00 | 24 | [258] Federico Zeballos v Gonzalo Villanueva [388] | 6-4,6-1 | |
| ITF M15 Buenos Aires | 09/22 16:50 | 29 | [480] Maximiliano Estevez v Gonzalo Villanueva [383] | 6-4,4-6,1-6 | |
| ITF M15 Buenos Aires | 09/21 16:40 | 28 | [476] Genaro Alberto Olivieri v Gonzalo Villanueva [383] | 4-6,3-6 | |
| ITF M15 Buenos Aires | 09/20 15:00 | 27 | Facundo D Acosta v Gonzalo Villanueva | 5-7,1-6 | |
| ITF M15 Buenos Aires | 09/19 12:00 | 26 | Michel Vernier v Gonzalo Villanueva | 6-7,6-3,4-6 | |
| ITF M15 Buenos Aires | 09/18 15:50 | 25 | Federico Moreno v Gonzalo Villanueva | 1-6,3-6 | |
| ITF M15 Lambare | 08/25 14:00 | 29 | Gonzalo Villanueva v Joao Lucas Reis da Silva | 6-1,6-3 | |
| ITF M15 Lambare | 08/24 15:00 | 28 | Gonzalo Villanueva v Gabriel Alejandro Hidalgo | 6-4,6-4 | |
| ITF M15 Lambare | 08/23 14:00 | 27 | Gonzalo Villanueva v Jorge Panta | 6-3,6-2 | |
| ITF M15 Lambare | 08/22 17:40 | 26 | Gonzalo Villanueva v Alex Blumenberg | 6-3,6-3 | |
| ITF M15 Lambare | 08/21 15:30 | 25 | Gonzalo Villanueva v Christian Oliveira | 6-1,7-6 | |
| ITF M15 Eupen | 08/11 13:00 | 29 | [485] Michael Geerts v Gonzalo Villanueva [398] | 4-6,1-6 | |
| ITF M15 Eupen | 08/10 12:15 | 28 | Genaro Alberto Olivieri v Gonzalo Villanueva | 2-6,6-7 | |
| ITF M15 Eupen | 08/09 13:40 | 27 | Daniel De Jonge v Gonzalo Villanueva | 6-4,1-6,0-6 | |
| ITF M15 Eupen | 08/08 14:05 | 26 | Gauthier Onclin v Gonzalo Villanueva | 7-5,2-6,6-7 | |
| ITF M15 Eupen | 08/06 15:00 | 25 | Colin Van Beem v Gonzalo Villanueva | 3-6,4-6 | |
| ITF M15 Brussels | 08/02 09:00 | 27 | Jesper De Jong v Gonzalo Villanueva | 2-6,6-3,6-4 | |
| ITF M15 Brussels | 08/01 10:20 | 26 | Gauthier Onclin v Gonzalo Villanueva | 6-4,2-6,3-6 | |
| ITF M15 Brussels | 07/31 10:00 | 25 | Daniel De Jonge v Gonzalo Villanueva | 3-6,1-6 | |
| ITF M25 Pontedera | 07/27 10:00 | 28 | Gonzalo Villanueva v Enrico Dalla Valle | 6-7,1-6 | |
| ITF M25 Pontedera | 07/26 14:00 | 27 | Giovanni Fonio v Gonzalo Villanueva | 6-3,1-6,5-7 |
Gonzalo Villanueva (born 13 January 1995) is an Argentine tennis player.
Villanueva has a career high ATP singles ranking of 268 achieved on 10 October 2022. He also has a career high ATP doubles ranking of 278 achieved on 8 August 2022.
Villanueva made his ATP main draw debut at the 2022 Los Cabos Open after entering the singles main draw as a lucky loser.