Stadium: Court 6 Round: 62 Ground: Clay
| Challenger Salinas 2 | 2021/04/27 14:30 | Nicolas Alvarez v Tak Khunn Wang | 6-7,4-6 |
| Challenger Salinas 2 | 2021/04/26 18:00 | Nicolas Alvarez v Yusuke Takahashi | 7-6,6-0 |
| Challenger Salinas | 2021/04/19 17:55 | Nicolas Alvarez v Nicolas Jarry | 1-6,1-6 |
| Challenger Santiago | 2021/03/18 16:00 | Nicolas Jarry v Nicolas Alvarez | 6-3,6-4 |
| Challenger Santiago | 2021/03/16 15:15 | Nicolas Alvarez v Pedro Sakamoto | 3-6,6-4,6-3 |
| ATP Santiago | 2021/03/06 13:00 | Alejandro Tabilo v Nicolas Alvarez | 6-4,6-3 |
| ATP Buenos Aires | 2021/02/27 20:05 | Jaume Munar v Nicolas Alvarez | 6-4,6-7,6-2 |
| ATP Cordoba | 2021/02/20 14:40 | Tomas Barrios Vera v Nicolas Alvarez | 6-1,6-2 |
| ITF M15 Bratislava | 2021/03/10 11:40 | Milos Karol v Jonathan Eysseric | 6-7,4-6 |
| ITF M15 Bratislava | 2021/03/09 09:00 | Samo Polakovic v Milos Karol | 4-6,1-6 |
| ITF M15 Bratislava | 2021/03/08 12:00 | Milos Karol v Nikolas Lahky | 6-3,6-2 |
| ITF M15 Bratislava | 2021/03/02 09:00 | Peter Nad v Milos Karol | 6-3,6-3 |
| ITF M15 Bratislava | 2021/03/01 09:00 | Milos Karol v Edward Hubner | 7-6,6-4 |
| ITF M15 Bratislava | 2020/11/24 09:00 | Filip Misolic v Milos Karol | 6-1,6-2 |
| ITF M15 Bratislava | 2020/11/23 12:00 | Milos Karol v Michael Weindl | 7-6,6-4 |
| ITF M15 Trnava | 2020/02/24 10:30 | Milos Karol v Emilien Voisin | 3-6,6-4,4-10 |