| ITF M25 Kottingbrunn | 2021/07/22 08:00 | Martins Podzus v Bogdan Ionut Apostol | 6-3,1-6,4-6 |
| ITF M25 Kottingbrunn | 2021/07/20 11:15 | Martins Podzus v Ronan Joncour | 6-0,6-1 |
| ITF M25 Telfs | 2021/07/16 09:35 | Filip Misolic v Martins Podzus | 3-6,7-6,10-5 |
| ITF M25 Telfs | 2021/07/13 11:00 | Yan Sabanin v Martins Podzus | 6-7,7-5,3-6 |
| ITF M15 Novomoskovsk | 2021/06/03 18:30 | Nikita Mashtakov v Martins Podzus | 4-6,1-6 |
| ITF M15 Novomoskovsk | 2021/05/26 06:15 | Nikita Mashtakov v Martins Podzus | 5-7,6-3,6-4 |
| ITF M15 Sharm El Sheikh | 2021/03/10 07:30 | Hanwen Li v Martins Podzus | 7-6,7-6 |
| ITF M15 Sharm El Sheikh | 2021/03/05 07:30 | Martins Podzus v Mukund Sasikumar | 3-6,1-6 |
| Challenger Segovia | 2021/07/27 14:25 | Igor Sijsling v Teymuraz Gabashvili | 1-6,3-6 |
| Challenger Pozoblanco | 2021/07/22 16:00 | Tim Van Rijthoven v Igor Sijsling | 6-4,6-4 |
| Challenger Iasi | 2021/07/12 11:50 | Felipe Meligeni Rodrigues Alves v Igor Sijsling | 7-5,6-2 |
| Challenger Braunschweig | 2021/07/04 10:10 | Igor Sijsling v Diego Hidalgo | 3-6,6-3,4-6 |
| Challenger Forli | 2021/06/16 11:15 | Mats Moraing v Igor Sijsling | 3-6,6-4,6-2 |
| Challenger Forli | 2021/06/14 15:40 | Igor Sijsling v Andrea Pellegrino | 6-2,7-6 |
| Challenger Nottingham | 2021/06/07 12:10 | Aleksandar Vukic v Igor Sijsling | 6-4,7-6 |
| Challenger Nottingham | 2021/06/06 18:30 | Igor Sijsling v Matteo Viola | 6-7,6-1,6-0 |