Stadium: Cancha 4 Round: 19 Ground: Hardcourt outdoor
| Challenger Salinas | 2021/04/19 14:30 | Gonzalo Villanueva v Nicolas Mejia | 3-6,0-6 |
| Challenger Salinas | 2021/04/18 15:00 | Gonzalo Villanueva v Felix Corwin | 6-7,6-4,7-5 |
| ITF M15 Cordoba | 2021/04/06 12:00 | Gonzalo Villanueva v Valerio Aboian | 6-7,3-6 |
| ITF M15 Cordoba | 2021/04/05 14:00 | Gonzalo Villanueva v Mateo Berne | 6-3,6-1 |
| ITF M15 Villa Maria | 2021/04/01 15:00 | Matheus Pucinelli De Almeida v Gonzalo Villanueva | 6-4,6-3 |
| ITF M15 Villa Maria | 2021/03/31 13:00 | Luciano Carraro v Gonzalo Villanueva | 5-7,6-0,4-6 |
| Challenger Santiago | 2021/03/17 14:00 | Sebastian Baez v Gonzalo Villanueva | 7-5,6-2 |
| Challenger Santiago | 2021/03/16 13:00 | Andrea Collarini v Gonzalo Villanueva | 4-6,4-6 |
| Challenger Salinas 2 | 2021/04/26 18:35 | Miguel M Larrea v David Poljak | 3-6,0-6 |
| Challenger Salinas | 2021/04/18 15:00 | Tak Khunn Wang v David Poljak | 6-3,6-3 |
| ITF M15 Sharm El Sheikh | 2021/04/10 07:30 | Mukund Sasikumar v David Poljak | 6-3,6-2 |
| ITF M15 Sharm El Sheikh | 2021/04/09 07:30 | David Poljak v Luke Johnson | 6-3,1-6,6-3 |
| ITF M15 Sharm El Sheikh | 2021/04/08 07:30 | David Poljak v Mattia Bellucci | 6-2,6-1 |
| ITF M15 Sharm El Sheikh | 2021/04/07 08:30 | David Poljak v Lukas Pokorny | 6-3,6-3 |
| ITF M15 Sharm El Sheikh | 2021/04/02 07:30 | Ryan Nijboer v David Poljak | 6-2,2-6,6-4 |
| ITF M15 Sharm El Sheikh | 2021/03/31 11:15 | Lorenzo Claverie v David Poljak | 1-6,6-2,2-6 |