| Challenger Buenos Aires Qual | 01/14 15:55 | 14 | [355] Gilbert Klier Junior v Gonzalo Villanueva [440] | 5-7,4-6 | |
| Challenger Buenos Aires | 01/09 20:05 | 25 | [298] Oleksii Krutykh v Gonzalo Villanueva [440] | 4-6,7-5,7-6 | |
| Challenger Buenos Aires | 01/08 15:15 | 19 | [472] Adolfo Daniel Vallejo v Gonzalo Villanueva [440] | 2-6,4-6 | |
| Challenger Buenos Aires | 01/07 13:00 | 14 | Vito Antonio Darderi v Gonzalo Villanueva | 1-6,0-6 | |
| ITF M15 Concepcion | 12/16 13:00 | 29 | Gonzalo Villanueva v Facundo Mena | 6-3,6-4 | |
| ITF M15 Concepcion | 12/15 13:00 | 28 | Gonzalo Villanueva v Ignacio A B Otarola | 6-0,6-1 | |
| ITF M15 Concepcion | 12/14 16:05 | 27 | Gonzalo Villanueva v Diego F Flores | 6-0,7-6 | |
| ITF M15 Concepcion | 12/13 15:05 | 26 | Gonzalo Villanueva v Miguel Angel Cabrera | 6-3,6-1 | |
| ITF M15 Concepcion | 12/11 18:00 | 25 | Gonzalo Villanueva v Fernando Cavallo | 6-2,6-0 | |
| ITF M15 Concepcion | 12/08 14:00 | 27 | [435] Gonzalo Villanueva v Nicolas Kicker [451] | 3-6,7-6,3-6 | |
| ITF M15 Concepcion | 12/07 16:35 | 26 | Gonzalo Villanueva v Manuel Mouilleron Salvo | 6-1,7-6 | |
| ITF M15 Concepcion | 12/05 14:00 | 25 | Gonzalo Villanueva v Nicolas Villalon Valdes | 6-1,6-3 | |
| Challenger Temuco | 11/29 15:00 | 26 | [447] Gonzalo Villanueva v Aleksandar Kovacevic [123] | 4-6,6-7 | |
| Challenger Temuco | 11/27 19:20 | 25 | [444] Rubin Statham v Gonzalo Villanueva [447] | 3-6,3-6 | |
| Challenger Montevideo | 11/12 18:20 | 14 | [253] Santiago Rodriguez Taverna v Gonzalo Villanueva [454] | 7-5,7-5 | |
| Challenger Lima | 11/05 20:15 | 14 | [453] Gonzalo Villanueva v Orlando Luz [353] | 3-6,7-6,4-6 | |
| Challenger Curitiba | 10/23 13:00 | 19 | Gonzalo Villanueva v Gilbert Klier Junior | 4-6,2-6 | |
| Challenger Curitiba | 10/22 13:00 | 14 | Gonzalo Villanueva v Kaua Lorenzo Santos Gava | 6-2,6-0 | |
| Challenger Santa Fe | 10/16 15:40 | 19 | [395] Carlos Taberner v Gonzalo Villanueva [456] | 6-1,6-4 | |
| Challenger Santa Fe | 10/15 16:35 | 14 | [472] Gonzalo Villanueva v Alvaro G Meza [369] | 6-3,4-6,6-3 | |
| Challenger Buenos Aires | 10/12 15:35 | 26 | [203] Franco Agamenone v Gonzalo Villanueva [472] | 7-6,6-2 | |
| Challenger Buenos Aires | 10/10 17:35 | 25 | [472] Gonzalo Villanueva v Juan Bautista Torres [337] | 2-6,6-2,6-3 | |
| Challenger Buenos Aires | 10/09 14:00 | 19 | [410] Alex Barrena v Gonzalo Villanueva [472] | 4-6,3-6 | |
| Challenger Buenos Aires | 10/08 13:00 | 14 | [472] Gonzalo Villanueva v Nicolas Mejia [317] | 6-4,6-2 | |
| ITF M25 Mendoza | 10/06 15:35 | 27 | Gonzalo Villanueva v Luciano Emanuel Ambrogi | 3-6,4-6 | |
| ITF M25 Mendoza | 10/05 16:25 | 26 | Gonzalo Villanueva v Facundo Juarez | 7-5,6-4 | |
| ITF M25 Mendoza | 10/03 16:40 | 25 | Gonzalo Villanueva v Fernando Cavallo | 5-7,6-1,6-0 | |
| ITF M25 Lujan | 09/28 14:45 | 26 | Juan C P Angelo v Gonzalo Villanueva | 6-2,6-4 | |
| ITF M25 Lujan | 09/26 15:15 | 25 | Juan Estevez v Gonzalo Villanueva | 3-6,0-6 | |
| Challenger Santa Cruz | 09/13 22:05 | 26 | [412] Gonzalo Villanueva v Genaro Alberto Olivieri [138] | 4-6,6-3,1-6 |
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.