Stadion: Cancha 4 Round: 26 Ground: Clay
| Challenger - Bogota | 2021/10/19 16:40 | Facundo Mena v Luca Castelnuovo | 6-4,6-2 |
| Challenger - Bogota | 2021/10/18 17:35 | Evan King v Luca Castelnuovo | 6-7,7-5,6-7 |
| Challenger - Bogota | 2021/10/17 18:10 | Luca Castelnuovo v Juan A H Serrano | 6-4,6-2 |
| ITF - M25 - Lima | 2021/10/12 15:00 | Gonzalo Villanueva v Luca Castelnuovo | 4-6,6-4,6-4 |
| ITF - M25 - Lima | 2021/10/05 15:00 | Luca Castelnuovo v Boris Arias | 4-6,6-4,3-6 |
| Challenger - Lima | 2021/09/26 20:50 | Carlos Gomez-Herrera v Luca Castelnuovo | 7-5,6-0 |
| Challenger - Ambato | 2021/09/20 15:00 | Luca Castelnuovo v Matias Zukas | 3-6,6-7 |
| Challenger - Ambato | 2021/09/19 15:00 | Gonzalo Villanueva v Luca Castelnuovo | 6-7,6-7 |
| Challenger - Bogota | 2021/10/17 16:30 | Alexandar Lazarov v Bart Stevens | 6-1,3-6,3-6 |
| ITF - M15 - Sozopol | 2021/10/08 07:00 | Alexandar Lazarov v Billy Harris | 4-6,2-6 |
| ITF - M15 - Sozopol | 2021/10/07 07:00 | Alexandar Lazarov v Adam Jurajda | 6-1,6-4 |
| ITF - M15 - Sozopol | 2021/10/05 10:00 | Alexandar Lazarov v Petr Nesterov | 6-1,6-1 |
| ATP - Sofia | 2021/09/29 15:35 | Alexandar Lazarov v Filip Krajinovic | 0-6,3-6 |
| Challenger - Kiew | 2021/09/05 08:00 | Aleksandr Braynin v Alexandar Lazarov | 7-6,6-4 |
| UTR Pro Tennis Series - Sofia | 2021/09/04 06:00 | Alexandar Lazarov v Yurii Dzhavakian | 6-3,6-7,5-1 |
| UTR Pro Tennis Series - Sofia | 2021/09/03 08:30 | Alexandar Lazarov v Leonid Sheyngezikht | 6-3,5-2 |