| Challenger Sao Leopoldo | 11/15 16:30 | 25 | [292] Gonzalo Villanueva v Facundo D Acosta [184] | 3-6,3-6 | |
| Challenger Montevideo | 11/08 20:45 | 25 | [283] Gonzalo Villanueva v Juan Pablo Paz [409] | 4-6,6-7 | |
| Challenger Montevideo | 11/07 18:40 | 19 | [283] Gonzalo Villanueva v Federico Zeballos [146] | 3-6,4-6 | |
| Challenger Montevideo | 11/06 20:00 | 14 | Gonzalo Villanueva v Dario Acosta | 7-6,6-3 | |
| Challenger Lima | 10/23 17:15 | 14 | Gonzalo Villanueva v Alvaro G Meza | Walkover | |
| Challenger Coquimbo | 10/18 13:00 | 25 | [156] Juan M Cerundolo v Gonzalo Villanueva [269] | 6-4,6-3 | |
| Challenger Rio De Janeiro | 10/11 14:40 | 25 | [117] Marco Cecchinato v Gonzalo Villanueva [268] | 6-4,6-2 | |
| Challenger Campinas | 10/05 13:30 | 26 | [272] Gonzalo Villanueva v Facundo Mena [157] | 4-6,7-5,2-6 | |
| Challenger Campinas | 10/04 13:00 | 25 | [272] Gonzalo Villanueva v Jose Pereira [418] | 0-6,6-4,6-3 | |
| Challenger Campinas | 10/03 14:40 | 19 | [272] Gonzalo Villanueva v Wilson Leite [456] | 6-3,6-4 | |
| Challenger Campinas | 10/02 15:40 | 14 | [277] Gonzalo Villanueva v Pedro Sakamoto [477] | Retired | |
| Challenger Buenos Aires | 09/26 19:15 | 25 | [161] Yannick Hanfmann v Gonzalo Villanueva [277] | 6-2,6-4 | |
| Challenger Villa Maria | 09/20 15:00 | 25 | [333] Mariano Navone v Gonzalo Villanueva [276] | 7-6,6-3 | |
| Challenger Tulln | 09/04 09:40 | 14 | [277] Gonzalo Villanueva v Sandro Kopp [474] | 6-7,2-6 | |
| Challenger Como | 08/30 13:50 | 25 | [188] Riccardo Bonadio v Gonzalo Villanueva [277] | 6-4,6-7,7-6 | |
| Challenger Banja Luka | 08/25 10:40 | 26 | [279] Gonzalo Villanueva v Alexey Vatutin [284] | 4-6,0-6 | |
| Challenger Banja Luka | 08/23 16:05 | 25 | [277] Mirza Basic v Gonzalo Villanueva [279] | 6-7,2-6 | |
| Challenger Santo Domingo | 08/16 00:00 | 25 | [81] Roberto Carballes Baena v Gonzalo Villanueva [276] | 6-0,7-5 | |
| Challenger Lima | 08/08 19:50 | 25 | [272] Gonzalo Villanueva v Roman A Burruchaga [334] | 2-6,3-6 | |
| ATP Los Cabos | 08/03 01:50 | 25 | [279] Gonzalo Villanueva v Steve Johnson [92] | 6-7,4-6 | |
| ATP Los Cabos | 08/01 02:00 | 19 | [221] Rinky Hijikata v Gonzalo Villanueva [277] | 6-4,6-3 | |
| ATP Los Cabos | 07/31 01:05 | 14 | Luis C Alvarez v Gonzalo Villanueva | 1-6,2-6 | |
| Challenger Bogota | 07/06 19:05 | 26 | [286] Gonzalo Villanueva v Roberto Quiroz [305] | 5-7,4-6 | |
| Challenger Bogota | 07/04 23:40 | 25 | Gonzalo Villanueva v Andres Urrea | 6-4,6-1 | |
| Challenger Cali | 06/28 15:20 | 25 | [354] Roman A Burruchaga v Gonzalo Villanueva [286] | 6-1,6-1 | |
| Challenger Buenos Aires | 06/24 14:30 | 27 | [291] Gonzalo Villanueva v Malek Jaziri [324] | 2-6,6-1,3-6 | |
| Challenger Buenos Aires | 06/23 13:00 | 26 | [291] Gonzalo Villanueva v Guido Andreozzi [297] | 7-6,6-2 | |
| Challenger Buenos Aires | 06/21 16:10 | 25 | [291] Gonzalo Villanueva v Leonardo Aboian [416] | 6-4,1-6,6-1 | |
| Challenger Corrientes | 06/13 17:00 | 25 | Gonzalo Villanueva v Mariano Navone | 5-7,4-6 | |
| Challenger Orlando | 06/07 14:00 | 25 | [263] Christian Harrison v Gonzalo Villanueva [302] | 6-4,6-2 |
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.