| UTR Pro Tennis Series Hillerod | 2022/02/16 17:00 | Ricardo Villacorta-Alonso v David Perez Sanz | 2-6,6-7 |
| UTR Pro Tennis Series Hillerod | 2022/02/15 18:30 | Ricardo Villacorta-Alonso v Sebastian Grundtvig Jorgensen | 6-4,7-5 |
| UTR Pro Tennis Series Hillerod | 2022/02/14 14:00 | Ricardo Villacorta-Alonso v Ivan Penev | 6-2,2-6,6-3 |
| UTR Pro Tennis Series Barcellona | 2022/02/02 11:00 | Ignasi De Rueda De Genover v Ricardo Villacorta-Alonso | 7-5,5-3 |
| UTR Pro Tennis Series Barcellona | 2022/02/01 11:00 | David Perez Sanz v Ricardo Villacorta-Alonso | 7-6,7-5 |
| UTR Pro Tennis Series Barcellona | 2022/01/31 09:30 | Ricardo Villacorta-Alonso v Pablo Carretero | 3-6,3-5 |
| UTR Pro Tennis Series Barcellona | 2022/01/30 09:30 | Ricardo Villacorta-Alonso v Jean-Christian Morandais | 6-4,6-7,5-3 |
| Challenger Segovia - Qual. | 2017/07/29 09:00 | Mario Mansilla Diez v Ricardo Villacorta-Alonso | 4-6,2-6 |
| UTR Pro Tennis Series Hillerod | 2022/02/16 15:30 | Ivan Penev v Nikolaj Katic | 6-2,5-4 |
| UTR Pro Tennis Series Hillerod | 2022/02/14 18:00 | Sebastian Grundtvig Jorgensen v Nikolaj Katic | 7-5,5-2 |
| ITF M15 Antalya | 2022/01/13 11:00 | Juan P Canas Garcia v Nikolaj Katic | 6-4,6-0 |
| ITF M15 Parnu | 2021/10/26 08:00 | Raffael Schaer v Nikolaj Katic | 7-5,6-4 |
| UTR Pro Tennis Series Copenhagen | 2021/10/23 07:00 | Nikolaj Katic v Jose Antonio Rodriguez Rodriguez | 6-7,2-6 |
| UTR Pro Tennis Series Copenhagen | 2021/10/21 07:00 | Nikolaj Katic v Felipe Mikkelsen | 6-4,6-2 |
| UTR Pro Tennis Series Copenhagen | 2021/10/20 13:15 | Nikolaj Katic v Vilhelm Fridell | 5-7,6-4,1-6 |
| UTR Pro Tennis Series Copenhagen | 2021/10/19 11:30 | Nikolaj Katic v Yurii Dzhavakian | 4-6,4-6 |